51997882 has 8 divisors (see below), whose sum is σ = 78157152. Its totient is φ = 25945500.

The previous prime is 51997873. The next prime is 51997901. The reversal of 51997882 is 28879915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-5 number, since 5×51997882⁵ (a number of 40 digits) contains 55555 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25494 + ... + 27457.

It is an arithmetic number, because the mean of its divisors is an integer number (9769644).

Almost surely, 2^51997882 is an apocalyptic number.

51997882 is a deficient number, since it is larger than the sum of its proper divisors (26159270).

51997882 is a wasteful number, since it uses less digits than its factorization.

51997882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53444.

The product of its digits is 362880, while the sum is 49.

The square root of 51997882 is about 7210.9556925556. The cubic root of 51997882 is about 373.2460480112.

The spelling of 51997882 in words is "fifty-one million, nine hundred ninety-seven thousand, eight hundred eighty-two".