42931161 has 64 divisors (see below), whose sum is σ = 79511040. Its totient is φ = 22291200.

The previous prime is 42931117. The next prime is 42931193. The reversal of 42931161 is 16113924.

It is not a de Polignac number, because 42931161 - 2¹⁰ = 42930137 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42931061) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 248071 + ... + 248243.

It is an arithmetic number, because the mean of its divisors is an integer number (1242360).

Almost surely, 2^42931161 is an apocalyptic number.

It is an amenable number.

42931161 is a deficient number, since it is larger than the sum of its proper divisors (36579879).

42931161 is a wasteful number, since it uses less digits than its factorization.

42931161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 297 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 42931161 is about 6552.1874973172. The cubic root of 42931161 is about 350.1527523714.

The spelling of 42931161 in words is "forty-two million, nine hundred thirty-one thousand, one hundred sixty-one".