61507272 has 16 divisors (see below), whose sum is σ = 153768240. Its totient is φ = 20502416.

The previous prime is 61507261. The next prime is 61507291. The reversal of 61507272 is 27270516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1281378 + ... + 1281425.

It is an arithmetic number, because the mean of its divisors is an integer number (9610515).

Almost surely, 2^61507272 is an apocalyptic number.

It is an amenable number.

61507272 is an abundant number, since it is smaller than the sum of its proper divisors (92260968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61507272 is a wasteful number, since it uses less digits than its factorization.

61507272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562812 (or 2562808 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 61507272 is about 7842.6572027598. The cubic root of 61507272 is about 394.7378958718.

Adding to 61507272 its reverse (27270516), we get a palindrome (88777788).

The spelling of 61507272 in words is "sixty-one million, five hundred seven thousand, two hundred seventy-two".