521364530040 has 64 divisors (see below), whose sum is σ = 1576409333760. Its totient is φ = 137935808640.

The previous prime is 521364530017. The next prime is 521364530041. The reversal of 521364530040 is 40035463125.

It is a junction number, because it is equal to n+sod(n) for n = 521364529983 and 521364530010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521364530041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17089896 + ... + 17120375.

It is an arithmetic number, because the mean of its divisors is an integer number (24631395840).

Almost surely, 2^521364530040 is an apocalyptic number.

It is an amenable number.

521364530040 is an abundant number, since it is smaller than the sum of its proper divisors (1055044803720).

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

521364530040 is a wasteful number, since it uses less digits than its factorization.

521364530040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34210412 (or 34210408 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 521364530040 its reverse (40035463125), we get a palindrome (561399993165).

The spelling of 521364530040 in words is "five hundred twenty-one billion, three hundred sixty-four million, five hundred thirty thousand, forty".