521413431 has 32 divisors (see below), whose sum is σ = 872640000. Its totient is φ = 269028480.

The previous prime is 521413429. The next prime is 521413433. The reversal of 521413431 is 134314125.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (521413429) and next prime (521413433).

It is not a de Polignac number, because 521413431 - 2¹ = 521413429 is a prime.

It is a super-2 number, since 2×521413431² = 543743932054383522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521413433) 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, 26845 + ... + 41993.

It is an arithmetic number, because the mean of its divisors is an integer number (27270000).

Almost surely, 2^521413431 is an apocalyptic number.

521413431 is a deficient number, since it is larger than the sum of its proper divisors (351226569).

521413431 is a wasteful number, since it uses less digits than its factorization.

521413431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15319.

The product of its digits is 1440, while the sum is 24.

The square root of 521413431 is about 22834.4789955891. The cubic root of 521413431 is about 804.8730846816.

Adding to 521413431 its reverse (134314125), we get a palindrome (655727556).

The spelling of 521413431 in words is "five hundred twenty-one million, four hundred thirteen thousand, four hundred thirty-one".