52521718 has 4 divisors (see below), whose sum is σ = 78782580. Its totient is φ = 26260858.

The previous prime is 52521709. The next prime is 52521727. The reversal of 52521718 is 81712525.

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

It is an interprime number because it is at equal distance from previous prime (52521709) and next prime (52521727).

It is a self number, because there is not a number n which added to its sum of digits gives 52521718.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13130428 + ... + 13130431.

It is an arithmetic number, because the mean of its divisors is an integer number (19695645).

Almost surely, 2^52521718 is an apocalyptic number.

52521718 is a deficient number, since it is larger than the sum of its proper divisors (26260862).

52521718 is a wasteful number, since it uses less digits than its factorization.

52521718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26260861.

The product of its digits is 5600, while the sum is 31.

The square root of 52521718 is about 7247.1869025160. The cubic root of 52521718 is about 374.4952450461.

The spelling of 52521718 in words is "fifty-two million, five hundred twenty-one thousand, seven hundred eighteen".