51245117 has 32 divisors (see below), whose sum is σ = 67495680. Its totient is φ = 37739520.

The previous prime is 51245107. The next prime is 51245141. The reversal of 51245117 is 71154215.

It is not a de Polignac number, because 51245117 - 2⁶ = 51245053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51245107) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118133 + ... + 118565.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^51245117 is an apocalyptic number.

It is an amenable number.

51245117 is a deficient number, since it is larger than the sum of its proper divisors (16250563).

51245117 is a wasteful number, since it uses less digits than its factorization.

51245117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533.

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

The square root of 51245117 is about 7158.5694800009. The cubic root of 51245117 is about 371.4361447526.

The spelling of 51245117 in words is "fifty-one million, two hundred forty-five thousand, one hundred seventeen".