521051431 has 4 divisors (see below), whose sum is σ = 521097192. Its totient is φ = 521005672.

The previous prime is 521051423. The next prime is 521051437. The reversal of 521051431 is 134150125.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 521051431 - 2³ = 521051423 is a prime.

It is a super-2 number, since 2×521051431² = 542989187494295522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521051437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9096 + ... + 33538.

It is an arithmetic number, because the mean of its divisors is an integer number (130274298).

Almost surely, 2^521051431 is an apocalyptic number.

521051431 is a deficient number, since it is larger than the sum of its proper divisors (45761).

521051431 is a wasteful number, since it uses less digits than its factorization.

521051431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45760.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 521051431 is about 22826.5510097343. The cubic root of 521051431 is about 804.6867760230.

The spelling of 521051431 in words is "five hundred twenty-one million, fifty-one thousand, four hundred thirty-one".