80922521 has 4 divisors (see below), whose sum is σ = 80945844. Its totient is φ = 80899200.

The previous prime is 80922481. The next prime is 80922529. The reversal of 80922521 is 12522908.

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 52417600 + 28504921 = 7240^2 + 5339^2 .

It is a cyclic number.

It is not a de Polignac number, because 80922521 - 2¹⁰ = 80921497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80922529) 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, 5300 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (20236461).

Almost surely, 2^80922521 is an apocalyptic number.

It is an amenable number.

80922521 is a deficient number, since it is larger than the sum of its proper divisors (23323).

80922521 is a wasteful number, since it uses less digits than its factorization.

80922521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 80922521 is about 8995.6945812983. The cubic root of 80922521 is about 432.5368714598.

The spelling of 80922521 in words is "eighty million, nine hundred twenty-two thousand, five hundred twenty-one".