52721511 has 4 divisors (see below), whose sum is σ = 70295352. Its totient is φ = 35147672.

The previous prime is 52721491. The next prime is 52721521. The reversal of 52721511 is 11512725.

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 52721511 - 2⁵ = 52721479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52721521) 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, 8786916 + ... + 8786921.

It is an arithmetic number, because the mean of its divisors is an integer number (17573838).

Almost surely, 2^52721511 is an apocalyptic number.

52721511 is a deficient number, since it is larger than the sum of its proper divisors (17573841).

52721511 is a wasteful number, since it uses less digits than its factorization.

52721511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17573840.

The product of its digits is 700, while the sum is 24.

The square root of 52721511 is about 7260.9579946451. The cubic root of 52721511 is about 374.9695050758.

The spelling of 52721511 in words is "fifty-two million, seven hundred twenty-one thousand, five hundred eleven".