51130697 has 4 divisors (see below), whose sum is σ = 51154116. Its totient is φ = 51107280.

The previous prime is 51130643. The next prime is 51130711. The reversal of 51130697 is 79603115.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38887696 + 12243001 = 6236^2 + 3499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51130697 is a prime.

It is a super-3 number, since 3×51130697³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51130297) 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, 8054 + ... + 12927.

It is an arithmetic number, because the mean of its divisors is an integer number (12788529).

Almost surely, 2^51130697 is an apocalyptic number.

It is an amenable number.

51130697 is a deficient number, since it is larger than the sum of its proper divisors (23419).

51130697 is a wasteful number, since it uses less digits than its factorization.

51130697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23418.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 51130697 is about 7150.5731938076. The cubic root of 51130697 is about 371.1594914403.

The spelling of 51130697 in words is "fifty-one million, one hundred thirty thousand, six hundred ninety-seven".