521234026140 has 48 divisors (see below), whose sum is σ = 1459565829792. Its totient is φ = 138985211136.

The previous prime is 521234026129. The next prime is 521234026163. The reversal of 521234026140 is 41620432125.

It is a super-2 number, since 2×521234026140² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 521234026098 and 521234026107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486322 + ... + 1130918.

It is an arithmetic number, because the mean of its divisors is an integer number (30407621454).

Almost surely, 2^521234026140 is an apocalyptic number.

It is an amenable number.

521234026140 is an abundant number, since it is smaller than the sum of its proper divisors (938331803652).

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

521234026140 is a wasteful number, since it uses less digits than its factorization.

521234026140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658086 (or 658084 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 521234026140 its reverse (41620432125), we get a palindrome (562854458265).

The spelling of 521234026140 in words is "five hundred twenty-one billion, two hundred thirty-four million, twenty-six thousand, one hundred forty".