51121475 has 12 divisors (see below), whose sum is σ = 64009296. Its totient is φ = 40498080.

The previous prime is 51121471. The next prime is 51121489. The reversal of 51121475 is 57412115.

It is not a de Polignac number, because 51121475 - 2² = 51121471 is a prime.

It is a super-2 number, since 2×51121475² = 5226810412351250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51121471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7352 + ... + 12501.

It is an arithmetic number, because the mean of its divisors is an integer number (5334108).

Almost surely, 2^51121475 is an apocalyptic number.

51121475 is a deficient number, since it is larger than the sum of its proper divisors (12887821).

51121475 is a wasteful number, since it uses less digits than its factorization.

51121475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966 (or 19961 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 51121475 is about 7149.9283213190. The cubic root of 51121475 is about 371.1371758266.

The spelling of 51121475 in words is "fifty-one million, one hundred twenty-one thousand, four hundred seventy-five".