61191315 has 16 divisors (see below), whose sum is σ = 108784800. Its totient is φ = 32635296.

The previous prime is 61191307. The next prime is 61191323. The reversal of 61191315 is 51319116.

It is an interprime number because it is at equal distance from previous prime (61191307) and next prime (61191323).

It is not a de Polignac number, because 61191315 - 2³ = 61191307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226500 + ... + 226769.

It is an arithmetic number, because the mean of its divisors is an integer number (6799050).

Almost surely, 2^61191315 is an apocalyptic number.

61191315 is a deficient number, since it is larger than the sum of its proper divisors (47593485).

61191315 is a wasteful number, since it uses less digits than its factorization.

61191315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453283 (or 453277 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 61191315 is about 7822.4877756376. The cubic root of 61191315 is about 394.0608248662.

The spelling of 61191315 in words is "sixty-one million, one hundred ninety-one thousand, three hundred fifteen".