51136390 has 8 divisors (see below), whose sum is σ = 92045520. Its totient is φ = 20454552.

The previous prime is 51136381. The next prime is 51136409. The reversal of 51136390 is 9363115.

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

It is a super-2 number, since 2×51136390² = 5229860764464200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556810 + ... + 2556829.

It is an arithmetic number, because the mean of its divisors is an integer number (11505690).

Almost surely, 2^51136390 is an apocalyptic number.

51136390 is a deficient number, since it is larger than the sum of its proper divisors (40909130).

51136390 is a wasteful number, since it uses less digits than its factorization.

51136390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113646.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 51136390 is about 7150.9712627027. The cubic root of 51136390 is about 371.1732661568.

The spelling of 51136390 in words is "fifty-one million, one hundred thirty-six thousand, three hundred ninety".