61255131 has 16 divisors (see below), whose sum is σ = 98832384. Its totient is φ = 32943744.

The previous prime is 61255127. The next prime is 61255133. The reversal of 61255131 is 13155216.

It is not a de Polignac number, because 61255131 - 2² = 61255127 is a prime.

It is a super-2 number, since 2×61255131² = 7504382147654322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61255133) 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 15 ways as a sum of consecutive naturals, for example, 85435 + ... + 86148.

It is an arithmetic number, because the mean of its divisors is an integer number (6177024).

Almost surely, 2^61255131 is an apocalyptic number.

61255131 is a deficient number, since it is larger than the sum of its proper divisors (37577253).

61255131 is a wasteful number, since it uses less digits than its factorization.

61255131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171610.

The product of its digits is 900, while the sum is 24.

The square root of 61255131 is about 7826.5657219498. The cubic root of 61255131 is about 394.1977650439.

The spelling of 61255131 in words is "sixty-one million, two hundred fifty-five thousand, one hundred thirty-one".