15351481 has 2 divisors, whose sum is σ = 15351482. Its totient is φ = 15351480.

The previous prime is 15351467. The next prime is 15351491. The reversal of 15351481 is 18415351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15139881 + 211600 = 3891^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 15351481 - 2¹⁹ = 14827193 is a prime.

It is a super-2 number, since 2×15351481² = 471335937786722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15351421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7675740 + 7675741.

It is an arithmetic number, because the mean of its divisors is an integer number (7675741).

Almost surely, 2^15351481 is an apocalyptic number.

It is an amenable number.

15351481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15351481 is an equidigital number, since it uses as much as digits as its factorization.

15351481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 28.

The square root of 15351481 is about 3918.0966042200. The cubic root of 15351481 is about 248.5326362247.

The spelling of 15351481 in words is "fifteen million, three hundred fifty-one thousand, four hundred eighty-one".