61118931 has 8 divisors (see below), whose sum is σ = 83694544. Its totient is φ = 39644640.

The previous prime is 61118923. The next prime is 61118951. The reversal of 61118931 is 13981116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61118931 - 2³ = 61118923 is a prime.

It is a super-2 number, since 2×61118931² = 7471047453165522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61118951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275200 + ... + 275421.

It is an arithmetic number, because the mean of its divisors is an integer number (10461818).

Almost surely, 2^61118931 is an apocalyptic number.

61118931 is a deficient number, since it is larger than the sum of its proper divisors (22575613).

61118931 is a wasteful number, since it uses less digits than its factorization.

61118931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550661.

The product of its digits is 1296, while the sum is 30.

The square root of 61118931 is about 7817.8597454802. The cubic root of 61118931 is about 393.9053836724.

The spelling of 61118931 in words is "sixty-one million, one hundred eighteen thousand, nine hundred thirty-one".