15205481 has 2 divisors, whose sum is σ = 15205482. Its totient is φ = 15205480.

The previous prime is 15205471. The next prime is 15205537. The reversal of 15205481 is 18450251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14891881 + 313600 = 3859^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 15205481 - 2⁶ = 15205417 is a prime.

It is a super-2 number, since 2×15205481² = 462413304882722, 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 15205481.

It is not a weakly prime, because it can be changed into another prime (15205451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7602740 + 7602741.

It is an arithmetic number, because the mean of its divisors is an integer number (7602741).

Almost surely, 2^15205481 is an apocalyptic number.

It is an amenable number.

15205481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15205481 is an equidigital number, since it uses as much as digits as its factorization.

15205481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 15205481 is about 3899.4205979863. The cubic root of 15205481 is about 247.7422367345.

The spelling of 15205481 in words is "fifteen million, two hundred five thousand, four hundred eighty-one".