51130905 has 32 divisors (see below), whose sum is σ = 94639104. Its totient is φ = 23088576.

The previous prime is 51130903. The next prime is 51130907. The reversal of 51130905 is 50903115.

It is an interprime number because it is at equal distance from previous prime (51130903) and next prime (51130907).

It is not a de Polignac number, because 51130905 - 2¹ = 51130903 is a prime.

It is a super-2 number, since 2×51130905² = 5228738892238050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51130903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5782 + ... + 11648.

It is an arithmetic number, because the mean of its divisors is an integer number (2957472).

Almost surely, 2^51130905 is an apocalyptic number.

It is an amenable number.

51130905 is a deficient number, since it is larger than the sum of its proper divisors (43508199).

51130905 is a wasteful number, since it uses less digits than its factorization.

51130905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5965.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 51130905 is about 7150.5877380814. The cubic root of 51130905 is about 371.1599947326.

The spelling of 51130905 in words is "fifty-one million, one hundred thirty thousand, nine hundred five".