61315772 has 24 divisors (see below), whose sum is σ = 122797920. Its totient is φ = 26242560.

The previous prime is 61315763. The next prime is 61315783. The reversal of 61315772 is 27751316.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37304 + ... + 38912.

It is an arithmetic number, because the mean of its divisors is an integer number (5116580).

Almost surely, 2^61315772 is an apocalyptic number.

It is an amenable number.

61315772 is an abundant number, since it is smaller than the sum of its proper divisors (61482148).

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

61315772 is a wasteful number, since it uses less digits than its factorization.

61315772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981 (or 2979 counting only the distinct ones).

The product of its digits is 8820, while the sum is 32.

The square root of 61315772 is about 7830.4388127358. The cubic root of 61315772 is about 394.3278040154.

The spelling of 61315772 in words is "sixty-one million, three hundred fifteen thousand, seven hundred seventy-two".