61272631 has 8 divisors (see below), whose sum is σ = 71516160. Its totient is φ = 51401688.

The previous prime is 61272619. The next prime is 61272649. The reversal of 61272631 is 13627216.

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

It is a cyclic number.

It is not a de Polignac number, because 61272631 - 2⁵ = 61272599 is a prime.

It is a super-2 number, since 2×61272631² = 7508670619324322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61272631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61272671) 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, 92791 + ... + 93448.

It is an arithmetic number, because the mean of its divisors is an integer number (8939520).

Almost surely, 2^61272631 is an apocalyptic number.

61272631 is a deficient number, since it is larger than the sum of its proper divisors (10243529).

61272631 is a wasteful number, since it uses less digits than its factorization.

61272631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186293.

The product of its digits is 3024, while the sum is 28.

The square root of 61272631 is about 7827.6836292737. The cubic root of 61272631 is about 394.2353009691.

Adding to 61272631 its reverse (13627216), we get a palindrome (74899847).

The spelling of 61272631 in words is "sixty-one million, two hundred seventy-two thousand, six hundred thirty-one".