521052023330040 has 64 divisors (see below), whose sum is σ = 1613580459356160. Its totient is φ = 134465038277760.

The previous prime is 521052023329979. The next prime is 521052023330101. The reversal of 521052023330040 is 40033320250125.

It is an interprime number because it is at equal distance from previous prime (521052023329979) and next prime (521052023330101).

It is a super-2 number, since 2×521052023330040² (a number of 30 digits) contains 22 as substring.

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

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, 70033870384 + ... + 70033877823.

It is an arithmetic number, because the mean of its divisors is an integer number (25212194677440).

Almost surely, 2^{521052023330040} is an apocalyptic number.

It is an amenable number.

521052023330040 is an abundant number, since it is smaller than the sum of its proper divisors (1092528436026120).

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

521052023330040 is a wasteful number, since it uses less digits than its factorization.

521052023330040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140067748252 (or 140067748248 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 521052023330040 its reverse (40033320250125), we get a palindrome (561085343580165).

The spelling of 521052023330040 in words is "five hundred twenty-one trillion, fifty-two billion, twenty-three million, three hundred thirty thousand, forty".