51623004 has 12 divisors (see below), whose sum is σ = 120453704. Its totient is φ = 17207664.

The previous prime is 51623003. The next prime is 51623009. The reversal of 51623004 is 40032615.

It is a happy number.

51623004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51623003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2150947 + ... + 2150970.

Almost surely, 2^51623004 is an apocalyptic number.

It is an amenable number.

51623004 is an abundant number, since it is smaller than the sum of its proper divisors (68830700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51623004 is a wasteful number, since it uses less digits than its factorization.

51623004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4301924 (or 4301922 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 51623004 is about 7184.9150308128. The cubic root of 51623004 is about 372.3469130563.

Adding to 51623004 its reverse (40032615), we get a palindrome (91655619).

The spelling of 51623004 in words is "fifty-one million, six hundred twenty-three thousand, four".