51117339 has 48 divisors (see below), whose sum is σ = 89171712. Its totient is φ = 25768512.

The previous prime is 51117337. The next prime is 51117347. The reversal of 51117339 is 93371115.

It is a happy number.

It is not a de Polignac number, because 51117339 - 2¹ = 51117337 is a prime.

It is a super-2 number, since 2×51117339² = 5225964692881842, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51117331) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 43372 + ... + 44534.

It is an arithmetic number, because the mean of its divisors is an integer number (1857744).

Almost surely, 2^51117339 is an apocalyptic number.

51117339 is the 3822-nd nonagonal number.

51117339 is a deficient number, since it is larger than the sum of its proper divisors (38054373).

51117339 is a wasteful number, since it uses less digits than its factorization.

51117339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1209 counting only the distinct ones).

The product of its digits is 2835, while the sum is 30.

The square root of 51117339 is about 7149.6390817999. The cubic root of 51117339 is about 371.1271665643.

The spelling of 51117339 in words is "fifty-one million, one hundred seventeen thousand, three hundred thirty-nine".