10155981 has 16 divisors (see below), whose sum is σ = 14845248. Its totient is φ = 6124800.

The previous prime is 10155973. The next prime is 10155983. The reversal of 10155981 is 18955101.

10155981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10155981 - 2³ = 10155973 is a prime.

It is a super-2 number, since 2×10155981² = 206287900144722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10155983) 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, 7315 + ... + 8591.

It is an arithmetic number, because the mean of its divisors is an integer number (927828).

Almost surely, 2^10155981 is an apocalyptic number.

10155981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10155981 is a deficient number, since it is larger than the sum of its proper divisors (4689267).

10155981 is a wasteful number, since it uses less digits than its factorization.

10155981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532.

The product of its (nonzero) digits is 1800, while the sum is 30.

The square root of 10155981 is about 3186.8449915237. The cubic root of 10155981 is about 216.5578643732.

It can be divided in two parts, 1015 and 5981, that added together give a palindrome (6996).

The spelling of 10155981 in words is "ten million, one hundred fifty-five thousand, nine hundred eighty-one".