61231516 has 6 divisors (see below), whose sum is σ = 107155160. Its totient is φ = 30615756.

The previous prime is 61231487. The next prime is 61231517. The reversal of 61231516 is 61513216.

61231516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231517) by changing a digit.

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 as a sum of consecutive naturals, namely, 7653936 + ... + 7653943.

Almost surely, 2^61231516 is an apocalyptic number.

It is an amenable number.

61231516 is a deficient number, since it is larger than the sum of its proper divisors (45923644).

61231516 is a wasteful number, since it uses less digits than its factorization.

61231516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15307883 (or 15307881 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 61231516 is about 7825.0569327002. The cubic root of 61231516 is about 394.1471016595.

The spelling of 61231516 in words is "sixty-one million, two hundred thirty-one thousand, five hundred sixteen".