51929381 has 8 divisors (see below), whose sum is σ = 60354240. Its totient is φ = 43756128.

The previous prime is 51929363. The next prime is 51929387. The reversal of 51929381 is 18392915.

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-51929381 is a prime.

It is a super-2 number, since 2×51929381² = 5393321222086322, 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 (51929387) 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, 62456 + ... + 63281.

It is an arithmetic number, because the mean of its divisors is an integer number (7544280).

Almost surely, 2^51929381 is an apocalyptic number.

It is an amenable number.

51929381 is a deficient number, since it is larger than the sum of its proper divisors (8424859).

51929381 is a wasteful number, since it uses less digits than its factorization.

51929381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125803.

The product of its digits is 19440, while the sum is 38.

The square root of 51929381 is about 7206.2043407053. The cubic root of 51929381 is about 373.0820736194.

The spelling of 51929381 in words is "fifty-one million, nine hundred twenty-nine thousand, three hundred eighty-one".