521130233401 has 16 divisors (see below), whose sum is σ = 532399246848. Its totient is φ = 510002841600.

The previous prime is 521130233369. The next prime is 521130233417. The reversal of 521130233401 is 104332031125.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 521130233401 - 2⁵ = 521130233369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521130233431) 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, 4669036 + ... + 4779346.

It is an arithmetic number, because the mean of its divisors is an integer number (33274952928).

Almost surely, 2^521130233401 is an apocalyptic number.

It is an amenable number.

521130233401 is a deficient number, since it is larger than the sum of its proper divisors (11269013447).

521130233401 is a wasteful number, since it uses less digits than its factorization.

521130233401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110952.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 521130233401 its reverse (104332031125), we get a palindrome (625462264526).

The spelling of 521130233401 in words is "five hundred twenty-one billion, one hundred thirty million, two hundred thirty-three thousand, four hundred one".