51903131 has 8 divisors (see below), whose sum is σ = 60290784. Its totient is φ = 43758720.

The previous prime is 51903121. The next prime is 51903133. The reversal of 51903131 is 13130915.

51903131 = 2720² + 2721² + ... + 2726².

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 51903131 - 2¹⁰ = 51902107 is a prime.

It is a super-2 number, since 2×51903131² = 5387870015206322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51903097 and 51903106.

It is not an unprimeable number, because it can be changed into a prime (51903133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60350 + ... + 61203.

It is an arithmetic number, because the mean of its divisors is an integer number (7536348).

Almost surely, 2^51903131 is an apocalyptic number.

51903131 is a deficient number, since it is larger than the sum of its proper divisors (8387653).

51903131 is a wasteful number, since it uses less digits than its factorization.

51903131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121621.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 51903131 is about 7204.3827632907. The cubic root of 51903131 is about 373.0191994181.

The spelling of 51903131 in words is "fifty-one million, nine hundred three thousand, one hundred thirty-one".