481507721 has 2 divisors, whose sum is σ = 481507722. Its totient is φ = 481507720.

The previous prime is 481507699. The next prime is 481507727. The reversal of 481507721 is 127705184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 470022400 + 11485321 = 21680^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 481507721 - 2⁶ = 481507657 is a prime.

It is a super-2 number, since 2×481507721² = 463699370765227682, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (481507727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240753860 + 240753861.

It is an arithmetic number, because the mean of its divisors is an integer number (240753861).

Almost surely, 2^481507721 is an apocalyptic number.

It is an amenable number.

481507721 is a deficient number, since it is larger than the sum of its proper divisors (1).

481507721 is an equidigital number, since it uses as much as digits as its factorization.

481507721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 481507721 is about 21943.2841890178. The cubic root of 481507721 is about 783.7924669563.

The spelling of 481507721 in words is "four hundred eighty-one million, five hundred seven thousand, seven hundred twenty-one".