51252447 has 4 divisors (see below), whose sum is σ = 68336600. Its totient is φ = 34168296.

The previous prime is 51252413. The next prime is 51252449. The reversal of 51252447 is 74425215.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51252447 - 2⁷ = 51252319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51252449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8542072 + ... + 8542077.

It is an arithmetic number, because the mean of its divisors is an integer number (17084150).

Almost surely, 2^51252447 is an apocalyptic number.

51252447 is a deficient number, since it is larger than the sum of its proper divisors (17084153).

51252447 is a wasteful number, since it uses less digits than its factorization.

51252447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17084152.

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

The square root of 51252447 is about 7159.0814354916. The cubic root of 51252447 is about 371.4538537383.

The spelling of 51252447 in words is "fifty-one million, two hundred fifty-two thousand, four hundred forty-seven".