51131001 has 16 divisors (see below), whose sum is σ = 71479296. Its totient is φ = 32449296.

The previous prime is 51130987. The next prime is 51131009. The reversal of 51131001 is 10013115.

It is not a de Polignac number, because 51131001 - 2⁵ = 51130969 is a prime.

It is a super-2 number, since 2×51131001² = 5228758526524002, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51131009) 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, 13726 + ... + 17048.

It is an arithmetic number, because the mean of its divisors is an integer number (4467456).

Almost surely, 2^51131001 is an apocalyptic number.

It is an amenable number.

51131001 is a deficient number, since it is larger than the sum of its proper divisors (20348295).

51131001 is a wasteful number, since it uses less digits than its factorization.

51131001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3572.

The product of its (nonzero) digits is 15, while the sum is 12.

The square root of 51131001 is about 7150.5944508132. The cubic root of 51131001 is about 371.1602270210.

Adding to 51131001 its reverse (10013115), we get a palindrome (61144116).

The spelling of 51131001 in words is "fifty-one million, one hundred thirty-one thousand, one".