15113881 has 2 divisors, whose sum is σ = 15113882. Its totient is φ = 15113880.

The previous prime is 15113869. The next prime is 15113897. The reversal of 15113881 is 18831151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12138256 + 2975625 = 3484^2 + 1725^2 .

It is a cyclic number.

It is not a de Polignac number, because 15113881 - 2¹⁷ = 14982809 is a prime.

It is a super-2 number, since 2×15113881² = 456858797764322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15113801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7556940 + 7556941.

It is an arithmetic number, because the mean of its divisors is an integer number (7556941).

Almost surely, 2^15113881 is an apocalyptic number.

It is an amenable number.

15113881 is a deficient number, since it is larger than the sum of its proper divisors (1).

15113881 is an equidigital number, since it uses as much as digits as its factorization.

15113881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 28.

The square root of 15113881 is about 3887.6575209244. The cubic root of 15113881 is about 247.2437561533.

The spelling of 15113881 in words is "fifteen million, one hundred thirteen thousand, eight hundred eighty-one".