51130947 has 16 divisors (see below), whose sum is σ = 78688512. Its totient is φ = 28927200.

The previous prime is 51130939. The next prime is 51130967. The reversal of 51130947 is 74903115.

It is not a de Polignac number, because 51130947 - 2³ = 51130939 is a prime.

It is a super-2 number, since 2×51130947² = 5228747482233618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51130907) 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, 9933 + ... + 14174.

It is an arithmetic number, because the mean of its divisors is an integer number (4918032).

Almost surely, 2^51130947 is an apocalyptic number.

51130947 is a deficient number, since it is larger than the sum of its proper divisors (27557565).

51130947 is a wasteful number, since it uses less digits than its factorization.

51130947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24218.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 51130947 is about 7150.5906749023. The cubic root of 51130947 is about 371.1600963588.

The spelling of 51130947 in words is "fifty-one million, one hundred thirty thousand, nine hundred forty-seven".