61512315 has 32 divisors (see below), whose sum is σ = 101943360. Its totient is φ = 31647744.

The previous prime is 61512289. The next prime is 61512337. The reversal of 61512315 is 51321516.

It is not a de Polignac number, because 61512315 - 2⁶ = 61512251 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75631 + ... + 76439.

It is an arithmetic number, because the mean of its divisors is an integer number (3185730).

Almost surely, 2^61512315 is an apocalyptic number.

61512315 is a deficient number, since it is larger than the sum of its proper divisors (40431045).

61512315 is a wasteful number, since it uses less digits than its factorization.

61512315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 900, while the sum is 24.

The square root of 61512315 is about 7842.9787070985. The cubic root of 61512315 is about 394.7486838038.

The spelling of 61512315 in words is "sixty-one million, five hundred twelve thousand, three hundred fifteen".