51163147 has 4 divisors (see below), whose sum is σ = 58472176. Its totient is φ = 43854120.

The previous prime is 51163139. The next prime is 51163169. The reversal of 51163147 is 74136115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51163147 - 2³ = 51163139 is a prime.

It is a super-2 number, since 2×51163147² = 5235335221887218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51163117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3654504 + ... + 3654517.

It is an arithmetic number, because the mean of its divisors is an integer number (14618044).

Almost surely, 2^51163147 is an apocalyptic number.

51163147 is a deficient number, since it is larger than the sum of its proper divisors (7309029).

51163147 is an equidigital number, since it uses as much as digits as its factorization.

51163147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7309028.

The product of its digits is 2520, while the sum is 28.

The square root of 51163147 is about 7152.8418827764. The cubic root of 51163147 is about 371.2379933916.

The spelling of 51163147 in words is "fifty-one million, one hundred sixty-three thousand, one hundred forty-seven".