51572567 has 4 divisors (see below), whose sum is σ = 51601440. Its totient is φ = 51543696.

The previous prime is 51572539. The next prime is 51572569. The reversal of 51572567 is 76527515.

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

It is a cyclic number.

It is not a de Polignac number, because 51572567 - 2⁶ = 51572503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51572567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51572569) 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, 11567 + ... + 15392.

It is an arithmetic number, because the mean of its divisors is an integer number (12900360).

Almost surely, 2^51572567 is an apocalyptic number.

51572567 is a deficient number, since it is larger than the sum of its proper divisors (28873).

51572567 is a wasteful number, since it uses less digits than its factorization.

51572567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28872.

The product of its digits is 73500, while the sum is 38.

The square root of 51572567 is about 7181.4042498665. The cubic root of 51572567 is about 372.2256093782.

The spelling of 51572567 in words is "fifty-one million, five hundred seventy-two thousand, five hundred sixty-seven".