51613293 has 4 divisors (see below), whose sum is σ = 68817728. Its totient is φ = 34408860.

The previous prime is 51613273. The next prime is 51613297. The reversal of 51613293 is 39231615.

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 not a de Polignac number, because 51613293 - 2¹⁰ = 51612269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51613293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51613297) 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, 8602213 + ... + 8602218.

It is an arithmetic number, because the mean of its divisors is an integer number (17204432).

Almost surely, 2^51613293 is an apocalyptic number.

It is an amenable number.

51613293 is a deficient number, since it is larger than the sum of its proper divisors (17204435).

51613293 is a wasteful number, since it uses less digits than its factorization.

51613293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17204434.

The product of its digits is 4860, while the sum is 30.

The square root of 51613293 is about 7184.2392081556. The cubic root of 51613293 is about 372.3235637265.

The spelling of 51613293 in words is "fifty-one million, six hundred thirteen thousand, two hundred ninety-three".