51538190 has 32 divisors (see below), whose sum is σ = 102643200. Its totient is φ = 18474400.

The previous prime is 51538171. The next prime is 51538297. The reversal of 51538190 is 9183515.

It is a super-2 number, since 2×51538190² = 5312370056952200, which contains 22 as substring.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 4511 + ... + 11109.

It is an arithmetic number, because the mean of its divisors is an integer number (3207600).

Almost surely, 2^51538190 is an apocalyptic number.

51538190 is a deficient number, since it is larger than the sum of its proper divisors (51105010).

51538190 is a wasteful number, since it uses less digits than its factorization.

51538190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6688.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 51538190 is about 7179.0103774824. The cubic root of 51538190 is about 372.1428855275.

The spelling of 51538190 in words is "fifty-one million, five hundred thirty-eight thousand, one hundred ninety".