51090193 has 24 divisors (see below), whose sum is σ = 65542400. Its totient is φ = 39778200.

The previous prime is 51090173. The next prime is 51090203. The reversal of 51090193 is 39109015.

It is a de Polignac number, because none of the positive numbers 2^k-51090193 is a prime.

It is a super-2 number, since 2×51090193² = 5220415641554498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51090133) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 40888 + ... + 42118.

Almost surely, 2^51090193 is an apocalyptic number.

It is an amenable number.

51090193 is a deficient number, since it is larger than the sum of its proper divisors (14452207).

51090193 is a wasteful number, since it uses less digits than its factorization.

51090193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1249 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 51090193 is about 7147.7404121862. The cubic root of 51090193 is about 371.0614589058.

The spelling of 51090193 in words is "fifty-one million, ninety thousand, one hundred ninety-three".