51862381 has 8 divisors (see below), whose sum is σ = 54878720. Its totient is φ = 48874752.

The previous prime is 51862361. The next prime is 51862387. The reversal of 51862381 is 18326815.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51862381 is a prime.

It is a super-2 number, since 2×51862381² = 5379413125978322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51862387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3405 + ... + 10738.

It is an arithmetic number, because the mean of its divisors is an integer number (6859840).

Almost surely, 2^51862381 is an apocalyptic number.

It is an amenable number.

51862381 is a deficient number, since it is larger than the sum of its proper divisors (3016339).

51862381 is a wasteful number, since it uses less digits than its factorization.

51862381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14355.

The product of its digits is 11520, while the sum is 34.

The square root of 51862381 is about 7201.5540683938. The cubic root of 51862381 is about 372.9215526937.

The spelling of 51862381 in words is "fifty-one million, eight hundred sixty-two thousand, three hundred eighty-one".