51211975 has 12 divisors (see below), whose sum is σ = 63605304. Its totient is φ = 40903520.

The previous prime is 51211931. The next prime is 51211981. The reversal of 51211975 is 57911215.

It is not a de Polignac number, because 51211975 - 2¹³ = 51203783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19437 + ... + 21913.

It is an arithmetic number, because the mean of its divisors is an integer number (5300442).

Almost surely, 2^51211975 is an apocalyptic number.

51211975 is a deficient number, since it is larger than the sum of its proper divisors (12393329).

51211975 is a wasteful number, since it uses less digits than its factorization.

51211975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314 (or 3309 counting only the distinct ones).

The product of its digits is 3150, while the sum is 31.

The square root of 51211975 is about 7156.2542576407. The cubic root of 51211975 is about 371.3560539252.

The spelling of 51211975 in words is "fifty-one million, two hundred eleven thousand, nine hundred seventy-five".