481491721 has 16 divisors (see below), whose sum is σ = 506373120. Its totient is φ = 457263360.

The previous prime is 481491713. The next prime is 481491781. The reversal of 481491721 is 127194184.

481491721 = T₅₅₅₈ + T₅₅₅₉ + ... + T₅₅₈₈.

It is a cyclic number.

It is not a de Polignac number, because 481491721 - 2³ = 481491713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (481491701) 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, 594765 + ... + 595573.

It is an arithmetic number, because the mean of its divisors is an integer number (31648320).

Almost surely, 2^481491721 is an apocalyptic number.

It is an amenable number.

481491721 is a deficient number, since it is larger than the sum of its proper divisors (24881399).

481491721 is a wasteful number, since it uses less digits than its factorization.

481491721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 16128, while the sum is 37.

The square root of 481491721 is about 21942.9196097511. The cubic root of 481491721 is about 783.7837853243.

The spelling of 481491721 in words is "four hundred eighty-one million, four hundred ninety-one thousand, seven hundred twenty-one".