51972384 has 48 divisors (see below), whose sum is σ = 136981152. Its totient is φ = 17253888.

The previous prime is 51972377. The next prime is 51972413. The reversal of 51972384 is 48327915.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×51972384² = 5402257397286912, 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, 26212 + ... + 28124.

It is an arithmetic number, because the mean of its divisors is an integer number (2853774).

Almost surely, 2^51972384 is an apocalyptic number.

It is an amenable number.

51972384 is an abundant number, since it is smaller than the sum of its proper divisors (85008768).

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

51972384 is a wasteful number, since it uses less digits than its factorization.

51972384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209 (or 2201 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 51972384 is about 7209.1874715532. The cubic root of 51972384 is about 373.1850289633.

The spelling of 51972384 in words is "fifty-one million, nine hundred seventy-two thousand, three hundred eighty-four".