51613623 has 24 divisors (see below), whose sum is σ = 76065600. Its totient is φ = 33718464.

The previous prime is 51613621. The next prime is 51613637. The reversal of 51613623 is 32631615.

It is not a de Polignac number, because 51613623 - 2¹ = 51613621 is a prime.

It is a super-2 number, since 2×51613623² = 5327932158372258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51613621) 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, 162661 + ... + 162977.

It is an arithmetic number, because the mean of its divisors is an integer number (3169400).

Almost surely, 2^51613623 is an apocalyptic number.

51613623 is a deficient number, since it is larger than the sum of its proper divisors (24451977).

51613623 is a wasteful number, since it uses less digits than its factorization.

51613623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 628 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 51613623 is about 7184.2621750602. The cubic root of 51613623 is about 372.3243572334.

The spelling of 51613623 in words is "fifty-one million, six hundred thirteen thousand, six hundred twenty-three".