51352823 has 4 divisors (see below), whose sum is σ = 53123640. Its totient is φ = 49582008.

The previous prime is 51352783. The next prime is 51352841. The reversal of 51352823 is 32825315.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32825315 = 5 ⋅6565063.

It is a cyclic number.

It is not a de Polignac number, because 51352823 - 2⁶ = 51352759 is a prime.

It is a super-2 number, since 2×51352823² = 5274224860138658, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1770787 = 51352823 / (5 + 1 + 3 + 5 + 2 + 8 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51352853) 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, 885365 + ... + 885422.

It is an arithmetic number, because the mean of its divisors is an integer number (13280910).

Almost surely, 2^51352823 is an apocalyptic number.

51352823 is a deficient number, since it is larger than the sum of its proper divisors (1770817).

51352823 is a wasteful number, since it uses less digits than its factorization.

51352823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770816.

The product of its digits is 7200, while the sum is 29.

The square root of 51352823 is about 7166.0884030271. The cubic root of 51352823 is about 371.6961884312.

The spelling of 51352823 in words is "fifty-one million, three hundred fifty-two thousand, eight hundred twenty-three".