133521463240 has 256 divisors, whose sum is σ = 353307225600. Its totient is φ = 44875776000.

The previous prime is 133521463199. The next prime is 133521463249. The reversal of 133521463240 is 42364125331.

It is a happy number.

It is a super-2 number, since 2×133521463240² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 133521463196 and 133521463205.

It is not an unprimeable number, because it can be changed into a prime (133521463249) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111174640 + ... + 111175840.

It is an arithmetic number, because the mean of its divisors is an integer number (1380106350).

Almost surely, 2^133521463240 is an apocalyptic number.

133521463240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133521463240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176653612800).

133521463240 is an abundant number, since it is smaller than the sum of its proper divisors (219785762360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133521463240 is a wasteful number, since it uses less digits than its factorization.

133521463240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 133521463240 its reverse (42364125331), we get a palindrome (175885588571).

The spelling of 133521463240 in words is "one hundred thirty-three billion, five hundred twenty-one million, four hundred sixty-three thousand, two hundred forty".