80521455 has 48 divisors (see below), whose sum is σ = 152077824. Its totient is φ = 36267840.

The previous prime is 80521453. The next prime is 80521501. The reversal of 80521455 is 55412508.

It is not a de Polignac number, because 80521455 - 2¹ = 80521453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80521451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51414 + ... + 52956.

It is an arithmetic number, because the mean of its divisors is an integer number (3168288).

Almost surely, 2^80521455 is an apocalyptic number.

80521455 is a deficient number, since it is larger than the sum of its proper divisors (71556369).

80521455 is a wasteful number, since it uses less digits than its factorization.

80521455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 80521455 is about 8973.3747832128. The cubic root of 80521455 is about 431.8211118478.

The spelling of 80521455 in words is "eighty million, five hundred twenty-one thousand, four hundred fifty-five".