15049981 has 16 divisors (see below), whose sum is σ = 16927488. Its totient is φ = 13305600.

The previous prime is 15049967. The next prime is 15049987. The reversal of 15049981 is 18994051.

It is a cyclic number.

It is not a de Polignac number, because 15049981 - 2⁵ = 15049949 is a prime.

It is a super-2 number, since 2×15049981² = 453003856200722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15049981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15049987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23536 + ... + 24166.

It is an arithmetic number, because the mean of its divisors is an integer number (1057968).

Almost surely, 2^15049981 is an apocalyptic number.

15049981 is the 2074-th nonagonal number.

It is an amenable number.

15049981 is a deficient number, since it is larger than the sum of its proper divisors (1877507).

15049981 is a wasteful number, since it uses less digits than its factorization.

15049981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 15049981 is about 3879.4304994419. The cubic root of 15049981 is about 246.8948231906.

The spelling of 15049981 in words is "fifteen million, forty-nine thousand, nine hundred eighty-one".