51253047 has 16 divisors (see below), whose sum is σ = 76320000. Its totient is φ = 33993432.

The previous prime is 51253043. The next prime is 51253049. The reversal of 51253047 is 74035215.

It is a happy number.

It is not a de Polignac number, because 51253047 - 2² = 51253043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51253047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51253043) 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, 604 + ... + 10142.

It is an arithmetic number, because the mean of its divisors is an integer number (4770000).

Almost surely, 2^51253047 is an apocalyptic number.

51253047 is a deficient number, since it is larger than the sum of its proper divisors (25066953).

51253047 is a wasteful number, since it uses less digits than its factorization.

51253047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9747 (or 9741 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 51253047 is about 7159.1233401863. The cubic root of 51253047 is about 371.4553032395.

The spelling of 51253047 in words is "fifty-one million, two hundred fifty-three thousand, forty-seven".