521329937401 has 32 divisors (see below), whose sum is σ = 648116268800. Its totient is φ = 410766370560.

The previous prime is 521329937377. The next prime is 521329937413. The reversal of 521329937401 is 104739923125.

It is a happy number.

It is not a de Polignac number, because 521329937401 - 2¹³ = 521329929209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521329937431) 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, 3636010 + ... + 3776668.

It is an arithmetic number, because the mean of its divisors is an integer number (20253633400).

Almost surely, 2^521329937401 is an apocalyptic number.

It is an amenable number.

521329937401 is a deficient number, since it is larger than the sum of its proper divisors (126786331399).

521329937401 is a wasteful number, since it uses less digits than its factorization.

521329937401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140946 (or 140920 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 521329937401 in words is "five hundred twenty-one billion, three hundred twenty-nine million, nine hundred thirty-seven thousand, four hundred one".