51642373 has 8 divisors (see below), whose sum is σ = 53809920. Its totient is φ = 49506240.

The previous prime is 51642341. The next prime is 51642401. The reversal of 51642373 is 37324615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51642373 - 2⁵ = 51642341 is a prime.

It is a super-2 number, since 2×51642373² = 5333869378142258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4468 + ... + 11101.

It is an arithmetic number, because the mean of its divisors is an integer number (6726240).

Almost surely, 2^51642373 is an apocalyptic number.

It is an amenable number.

51642373 is a deficient number, since it is larger than the sum of its proper divisors (2167547).

51642373 is a wasteful number, since it uses less digits than its factorization.

51642373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15707.

The product of its digits is 15120, while the sum is 31.

The square root of 51642373 is about 7186.2627978665. The cubic root of 51642373 is about 372.3934755381.

Adding to 51642373 its reverse (37324615), we get a palindrome (88966988).

The spelling of 51642373 in words is "fifty-one million, six hundred forty-two thousand, three hundred seventy-three".