51772493 has 4 divisors (see below), whose sum is σ = 52247580. Its totient is φ = 51297408.

The previous prime is 51772459. The next prime is 51772507. The reversal of 51772493 is 39427715.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46812964 + 4959529 = 6842^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 51772493 - 2¹⁰ = 51771469 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 (51772423) 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, 237380 + ... + 237597.

It is an arithmetic number, because the mean of its divisors is an integer number (13061895).

Almost surely, 2^51772493 is an apocalyptic number.

It is an amenable number.

51772493 is a deficient number, since it is larger than the sum of its proper divisors (475087).

51772493 is a wasteful number, since it uses less digits than its factorization.

51772493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475086.

The product of its digits is 52920, while the sum is 38.

The square root of 51772493 is about 7195.3104866990. The cubic root of 51772493 is about 372.7059785989.

The spelling of 51772493 in words is "fifty-one million, seven hundred seventy-two thousand, four hundred ninety-three".