51623673 has 4 divisors (see below), whose sum is σ = 68831568. Its totient is φ = 34415780.

The previous prime is 51623669. The next prime is 51623681. The reversal of 51623673 is 37632615.

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 a cyclic number.

It is not a de Polignac number, because 51623673 - 2² = 51623669 is a prime.

It is a super-2 number, since 2×51623673² = 5330007228021858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51623623) 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, 8603943 + ... + 8603948.

It is an arithmetic number, because the mean of its divisors is an integer number (17207892).

Almost surely, 2^51623673 is an apocalyptic number.

It is an amenable number.

51623673 is a deficient number, since it is larger than the sum of its proper divisors (17207895).

51623673 is a wasteful number, since it uses less digits than its factorization.

51623673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17207894.

The product of its digits is 22680, while the sum is 33.

The square root of 51623673 is about 7184.9615865361. The cubic root of 51623673 is about 372.3485215059.

The spelling of 51623673 in words is "fifty-one million, six hundred twenty-three thousand, six hundred seventy-three".