15480631 has 2 divisors, whose sum is σ = 15480632. Its totient is φ = 15480630.

The previous prime is 15480617. The next prime is 15480637. The reversal of 15480631 is 13608451.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15480631 - 2¹¹ = 15478583 is a prime.

It is a super-2 number, since 2×15480631² = 479299872316322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15480631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15480637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7740315 + 7740316.

It is an arithmetic number, because the mean of its divisors is an integer number (7740316).

Almost surely, 2^15480631 is an apocalyptic number.

15480631 is a deficient number, since it is larger than the sum of its proper divisors (1).

15480631 is an equidigital number, since it uses as much as digits as its factorization.

15480631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 15480631 is about 3934.5433025956. The cubic root of 15480631 is about 249.2276483489.

The spelling of 15480631 in words is "fifteen million, four hundred eighty thousand, six hundred thirty-one".