40981155 has 16 divisors (see below), whose sum is σ = 65940480. Its totient is φ = 21733088.

The previous prime is 40981141. The next prime is 40981189. The reversal of 40981155 is 55118904.

It is a cyclic number.

It is not a de Polignac number, because 40981155 - 2⁴ = 40981139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4947 + ... + 10316.

It is an arithmetic number, because the mean of its divisors is an integer number (4121280).

Almost surely, 2^40981155 is an apocalyptic number.

40981155 is a deficient number, since it is larger than the sum of its proper divisors (24959325).

40981155 is a wasteful number, since it uses less digits than its factorization.

40981155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15450.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 40981155 is about 6401.6525210292. The cubic root of 40981155 is about 344.7688853290.

It can be divided in two parts, 4098 and 1155, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 40981155 in words is "forty million, nine hundred eighty-one thousand, one hundred fifty-five".