51465013 has 4 divisors (see below), whose sum is σ = 51503200. Its totient is φ = 51426828.

The previous prime is 51464993. The next prime is 51465019. The reversal of 51465013 is 31056415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51465013 - 2¹⁷ = 51333941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51465019) 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, 16995 + ... + 19792.

It is an arithmetic number, because the mean of its divisors is an integer number (12875800).

Almost surely, 2^51465013 is an apocalyptic number.

It is an amenable number.

51465013 is a deficient number, since it is larger than the sum of its proper divisors (38187).

51465013 is a wasteful number, since it uses less digits than its factorization.

51465013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38186.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51465013 is about 7173.9119732542. The cubic root of 51465013 is about 371.9666718706.

The spelling of 51465013 in words is "fifty-one million, four hundred sixty-five thousand, thirteen".