51690359 has 8 divisors (see below), whose sum is σ = 59119008. Its totient is φ = 44272800.

The previous prime is 51690329. The next prime is 51690389. The reversal of 51690359 is 95309615.

It is an interprime number because it is at equal distance from previous prime (51690329) and next prime (51690389).

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

It is a cyclic number.

It is not a de Polignac number, because 51690359 - 2²⁴ = 34913143 is a prime.

It is a super-3 number, since 3×51690359³ (a number of 24 digits) contains 333 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 (51690329) 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, 14009 + ... + 17309.

It is an arithmetic number, because the mean of its divisors is an integer number (7389876).

Almost surely, 2^51690359 is an apocalyptic number.

51690359 is a deficient number, since it is larger than the sum of its proper divisors (7428649).

51690359 is a wasteful number, since it uses less digits than its factorization.

51690359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5545.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 51690359 is about 7189.6007538667. The cubic root of 51690359 is about 372.5087822802.

The spelling of 51690359 in words is "fifty-one million, six hundred ninety thousand, three hundred fifty-nine".