61057515 has 16 divisors (see below), whose sum is σ = 99069696. Its totient is φ = 32104800.

The previous prime is 61057483. The next prime is 61057519. The reversal of 61057515 is 51575016.

It is not a de Polignac number, because 61057515 - 2⁵ = 61057483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61057519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27601 + ... + 29730.

It is an arithmetic number, because the mean of its divisors is an integer number (6191856).

Almost surely, 2^61057515 is an apocalyptic number.

61057515 is a deficient number, since it is larger than the sum of its proper divisors (38012181).

61057515 is a wasteful number, since it uses less digits than its factorization.

61057515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57410.

The product of its (nonzero) digits is 5250, while the sum is 30.

The square root of 61057515 is about 7813.9308289746. The cubic root of 61057515 is about 393.7733994660.

The spelling of 61057515 in words is "sixty-one million, fifty-seven thousand, five hundred fifteen".