68522521 has 8 divisors (see below), whose sum is σ = 71828064. Its totient is φ = 65294880.

The previous prime is 68522513. The next prime is 68522533. The reversal of 68522521 is 12522586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68522521 - 2³ = 68522513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68522551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17671 + ... + 21196.

It is an arithmetic number, because the mean of its divisors is an integer number (8978508).

Almost surely, 2^68522521 is an apocalyptic number.

It is an amenable number.

68522521 is a deficient number, since it is larger than the sum of its proper divisors (3305543).

68522521 is a wasteful number, since it uses less digits than its factorization.

68522521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38951.

The product of its digits is 9600, while the sum is 31.

The square root of 68522521 is about 8277.8331101805. The cubic root of 68522521 is about 409.2083096663.

The spelling of 68522521 in words is "sixty-eight million, five hundred twenty-two thousand, five hundred twenty-one".