51623472 has 20 divisors (see below), whose sum is σ = 133360760. Its totient is φ = 17207808.

The previous prime is 51623459. The next prime is 51623479. The reversal of 51623472 is 27432615.

It is a super-2 number, since 2×51623472² = 5329965722669568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51623479) 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, 537697 + ... + 537792.

It is an arithmetic number, because the mean of its divisors is an integer number (6668038).

Almost surely, 2^51623472 is an apocalyptic number.

It is an amenable number.

51623472 is an abundant number, since it is smaller than the sum of its proper divisors (81737288).

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

51623472 is a wasteful number, since it uses less digits than its factorization.

51623472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075500 (or 1075494 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 51623472 is about 7184.9475989738. The cubic root of 51623472 is about 372.3480382512.

The spelling of 51623472 in words is "fifty-one million, six hundred twenty-three thousand, four hundred seventy-two".