61631272 has 16 divisors (see below), whose sum is σ = 117142740. Its totient is φ = 30393216.

The previous prime is 61631267. The next prime is 61631287. The reversal of 61631272 is 27213616.

61631272 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56460196 + 5171076 = 7514^2 + 2274^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61631272.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52183 + ... + 53350.

Almost surely, 2^61631272 is an apocalyptic number.

It is an amenable number.

61631272 is a deficient number, since it is larger than the sum of its proper divisors (55511468).

61631272 is a wasteful number, since it uses less digits than its factorization.

61631272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105612 (or 105608 counting only the distinct ones).

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

The square root of 61631272 is about 7850.5587062323. The cubic root of 61631272 is about 395.0029845419.

Adding to 61631272 its reverse (27213616), we get a palindrome (88844888).

The spelling of 61631272 in words is "sixty-one million, six hundred thirty-one thousand, two hundred seventy-two".