61315047 has 6 divisors (see below), whose sum is σ = 88566192. Its totient is φ = 40876692.

The previous prime is 61315013. The next prime is 61315069. The reversal of 61315047 is 74051316.

61315047 is a `hidden beast` number, since 613 + 1 + 5 + 0 + 47 = 666.

It is not a de Polignac number, because 61315047 - 2¹⁰ = 61314023 is a prime.

It is a super-2 number, since 2×61315047² = 7519069977224418, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61315047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61315097) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3406383 + ... + 3406400.

It is an arithmetic number, because the mean of its divisors is an integer number (14761032).

Almost surely, 2^61315047 is an apocalyptic number.

61315047 is a deficient number, since it is larger than the sum of its proper divisors (27251145).

61315047 is a wasteful number, since it uses less digits than its factorization.

61315047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6812789 (or 6812786 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 61315047 is about 7830.3925188971. The cubic root of 61315047 is about 394.3262498270.

The spelling of 61315047 in words is "sixty-one million, three hundred fifteen thousand, forty-seven".