15040081 has 4 divisors (see below), whose sum is σ = 17188672. Its totient is φ = 12891492.

The previous prime is 15040079. The next prime is 15040097. The reversal of 15040081 is 18004051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15040081 - 2¹ = 15040079 is a prime.

It is a super-2 number, since 2×15040081² = 452408072973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15040061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074285 + ... + 1074298.

It is an arithmetic number, because the mean of its divisors is an integer number (4297168).

Almost surely, 2^15040081 is an apocalyptic number.

It is an amenable number.

15040081 is a deficient number, since it is larger than the sum of its proper divisors (2148591).

15040081 is an equidigital number, since it uses as much as digits as its factorization.

15040081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148590.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 15040081 is about 3878.1543290591. The cubic root of 15040081 is about 246.8406748410.

The spelling of 15040081 in words is "fifteen million, forty thousand, eighty-one".