61242531 has 16 divisors (see below), whose sum is σ = 94905600. Its totient is φ = 34401888.

The previous prime is 61242527. The next prime is 61242553. The reversal of 61242531 is 13524216.

It is not a de Polignac number, because 61242531 - 2² = 61242527 is a prime.

It is a super-2 number, since 2×61242531² = 7501295206571922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61242521) 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, 23476 + ... + 25953.

It is an arithmetic number, because the mean of its divisors is an integer number (5931600).

Almost surely, 2^61242531 is an apocalyptic number.

61242531 is a deficient number, since it is larger than the sum of its proper divisors (33663069).

61242531 is a wasteful number, since it uses less digits than its factorization.

61242531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49498.

The product of its digits is 1440, while the sum is 24.

The square root of 61242531 is about 7825.7607297949. The cubic root of 61242531 is about 394.1707347508.

Adding to 61242531 its reverse (13524216), we get a palindrome (74766747).

The spelling of 61242531 in words is "sixty-one million, two hundred forty-two thousand, five hundred thirty-one".