520161951 has 32 divisors (see below), whose sum is σ = 753131520. Its totient is φ = 318348800.

The previous prime is 520161949. The next prime is 520161953. The reversal of 520161951 is 159161025.

It is an interprime number because it is at equal distance from previous prime (520161949) and next prime (520161953).

It is a cyclic number.

It is not a de Polignac number, because 520161951 - 2¹ = 520161949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520161953) 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, 381511 + ... + 382871.

It is an arithmetic number, because the mean of its divisors is an integer number (23535360).

Almost surely, 2^520161951 is an apocalyptic number.

520161951 is a deficient number, since it is larger than the sum of its proper divisors (232969569).

520161951 is a wasteful number, since it uses less digits than its factorization.

520161951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 520161951 is about 22807.0592361225. The cubic root of 520161951 is about 804.2286251754.

The spelling of 520161951 in words is "five hundred twenty million, one hundred sixty-one thousand, nine hundred fifty-one".