53772557 has 4 divisors (see below), whose sum is σ = 53802336. Its totient is φ = 53742780.

The previous prime is 53772553. The next prime is 53772571. The reversal of 53772557 is 75527735.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53772557 - 2² = 53772553 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 (53772553) 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, 11993 + ... + 15854.

It is an arithmetic number, because the mean of its divisors is an integer number (13450584).

Almost surely, 2^53772557 is an apocalyptic number.

It is an amenable number.

53772557 is a deficient number, since it is larger than the sum of its proper divisors (29779).

53772557 is a wasteful number, since it uses less digits than its factorization.

53772557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29778.

The product of its digits is 257250, while the sum is 41.

The square root of 53772557 is about 7332.9773625724. The cubic root of 53772557 is about 377.4449010997. Note that the first 3 decimals are identical.

The spelling of 53772557 in words is "fifty-three million, seven hundred seventy-two thousand, five hundred fifty-seven".