51212427 has 16 divisors (see below), whose sum is σ = 78266880. Its totient is φ = 29178432.

The previous prime is 51212407. The next prime is 51212459. The reversal of 51212427 is 72421215.

It is not a de Polignac number, because 51212427 - 2⁷ = 51212299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51212397 and 51212406.

It is not an unprimeable number, because it can be changed into a prime (51212407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4143 + ... + 10935.

It is an arithmetic number, because the mean of its divisors is an integer number (4891680).

Almost surely, 2^51212427 is an apocalyptic number.

51212427 is a deficient number, since it is larger than the sum of its proper divisors (27054453).

51212427 is a wasteful number, since it uses less digits than its factorization.

51212427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7162.

The product of its digits is 1120, while the sum is 24.

The square root of 51212427 is about 7156.2858383382. The cubic root of 51212427 is about 371.3571464590.

The spelling of 51212427 in words is "fifty-one million, two hundred twelve thousand, four hundred twenty-seven".