51347972 has 24 divisors (see below), whose sum is σ = 97720896. Its totient is φ = 23466528.

The previous prime is 51347969. The next prime is 51347993. The reversal of 51347972 is 27974315.

It is a super-2 number, since 2×51347972² = 5273228457025568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 563 + ... + 10149.

It is an arithmetic number, because the mean of its divisors is an integer number (4071704).

Almost surely, 2^51347972 is an apocalyptic number.

51347972 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

51347972 is a deficient number, since it is larger than the sum of its proper divisors (46372924).

51347972 is a wasteful number, since it uses less digits than its factorization.

51347972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9707 (or 9705 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 51347972 is about 7165.7499258626. The cubic root of 51347972 is about 371.6844840764.

The spelling of 51347972 in words is "fifty-one million, three hundred forty-seven thousand, nine hundred seventy-two".