51247245 has 16 divisors (see below), whose sum is σ = 93709440. Its totient is φ = 23427264.

The previous prime is 51247219. The next prime is 51247267. The reversal of 51247245 is 54274215.

It is not a de Polignac number, because 51247245 - 2⁵ = 51247213 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243930 + ... + 244139.

It is an arithmetic number, because the mean of its divisors is an integer number (5856840).

Almost surely, 2^51247245 is an apocalyptic number.

It is an amenable number.

51247245 is a deficient number, since it is larger than the sum of its proper divisors (42462195).

51247245 is a wasteful number, since it uses less digits than its factorization.

51247245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488084.

The product of its digits is 11200, while the sum is 30.

The square root of 51247245 is about 7158.7181115057. The cubic root of 51247245 is about 371.4412860891.

The spelling of 51247245 in words is "fifty-one million, two hundred forty-seven thousand, two hundred forty-five".