521055967 has 16 divisors (see below), whose sum is σ = 575430912. Its totient is φ = 469647360.

The previous prime is 521055949. The next prime is 521055973. The reversal of 521055967 is 769550125.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521055967 is a prime.

It is a super-3 number, since 3×521055967³ (a number of 27 digits) contains 333 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 (521055907) 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, 46023 + ... + 56215.

It is an arithmetic number, because the mean of its divisors is an integer number (35964432).

Almost surely, 2^521055967 is an apocalyptic number.

521055967 is a deficient number, since it is larger than the sum of its proper divisors (54374945).

521055967 is a wasteful number, since it uses less digits than its factorization.

521055967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10338.

The product of its (nonzero) digits is 94500, while the sum is 40.

The square root of 521055967 is about 22826.6503674981. The cubic root of 521055967 is about 804.6891110763.

The spelling of 521055967 in words is "five hundred twenty-one million, fifty-five thousand, nine hundred sixty-seven".