408521481 has 16 divisors (see below), whose sum is σ = 551707200. Its totient is φ = 268851968.

The previous prime is 408521471. The next prime is 408521483. The reversal of 408521481 is 184125804.

It is a cyclic number.

It is not a de Polignac number, because 408521481 - 2⁷ = 408521353 is a prime.

It is a super-2 number, since 2×408521481² = 333779600876866722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (408521483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316285 + ... + 317573.

It is an arithmetic number, because the mean of its divisors is an integer number (34481700).

Almost surely, 2^408521481 is an apocalyptic number.

It is an amenable number.

408521481 is a deficient number, since it is larger than the sum of its proper divisors (143185719).

408521481 is a wasteful number, since it uses less digits than its factorization.

408521481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 408521481 is about 20211.9143328879. The cubic root of 408521481 is about 742.0018120768.

The spelling of 408521481 in words is "four hundred eight million, five hundred twenty-one thousand, four hundred eighty-one".