51056613 has 24 divisors (see below), whose sum is σ = 75380448. Its totient is φ = 33292512.

The previous prime is 51056569. The next prime is 51056623. The reversal of 51056613 is 31665015.

It is a happy number.

It is not a de Polignac number, because 51056613 - 2¹² = 51052517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136695 + ... + 137067.

It is an arithmetic number, because the mean of its divisors is an integer number (3140852).

Almost surely, 2^51056613 is an apocalyptic number.

It is an amenable number.

51056613 is a deficient number, since it is larger than the sum of its proper divisors (24323835).

51056613 is a wasteful number, since it uses less digits than its factorization.

51056613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 51056613 is about 7145.3910319870. The cubic root of 51056613 is about 370.9801453570.

The spelling of 51056613 in words is "fifty-one million, fifty-six thousand, six hundred thirteen".