61155147 has 16 divisors (see below), whose sum is σ = 82857600. Its totient is φ = 40115712.

The previous prime is 61155139. The next prime is 61155161. The reversal of 61155147 is 74155116.

It is not a de Polignac number, because 61155147 - 2³ = 61155139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61155187) 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, 111528 + ... + 112074.

It is an arithmetic number, because the mean of its divisors is an integer number (5178600).

Almost surely, 2^61155147 is an apocalyptic number.

61155147 is a deficient number, since it is larger than the sum of its proper divisors (21702453).

61155147 is a wasteful number, since it uses less digits than its factorization.

61155147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082.

The product of its digits is 4200, while the sum is 30.

The square root of 61155147 is about 7820.1756374138. The cubic root of 61155147 is about 393.9831711400.

The spelling of 61155147 in words is "sixty-one million, one hundred fifty-five thousand, one hundred forty-seven".