145121533000 has 128 divisors (see below), whose sum is σ = 345801830400. Its totient is φ = 56988480000.

The previous prime is 145121532989. The next prime is 145121533003. The reversal of 145121533000 is 335121541.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (145121533003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67907932 + ... + 67910068.

It is an arithmetic number, because the mean of its divisors is an integer number (2701576800).

Almost surely, 2^145121533000 is an apocalyptic number.

145121533000 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 145121533000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172900915200).

145121533000 is an abundant number, since it is smaller than the sum of its proper divisors (200680297400).

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

145121533000 is a wasteful number, since it uses less digits than its factorization.

145121533000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3368 (or 3354 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 145121533000 its reverse (335121541), we get a palindrome (145456654541).

The spelling of 145121533000 in words is "one hundred forty-five billion, one hundred twenty-one million, five hundred thirty-three thousand".