40981537 has 16 divisors (see below), whose sum is σ = 44661760. Its totient is φ = 37476432.

The previous prime is 40981531. The next prime is 40981547. The reversal of 40981537 is 73518904.

It is a cyclic number.

It is not a de Polignac number, because 40981537 - 2³ = 40981529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40981496 and 40981505.

It is not an unprimeable number, because it can be changed into a prime (40981531) 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, 83908 + ... + 84394.

It is an arithmetic number, because the mean of its divisors is an integer number (2791360).

Almost surely, 2^40981537 is an apocalyptic number.

It is an amenable number.

40981537 is a deficient number, since it is larger than the sum of its proper divisors (3680223).

40981537 is a wasteful number, since it uses less digits than its factorization.

40981537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 40981537 is about 6401.6823570059. The cubic root of 40981537 is about 344.7699565637.

The spelling of 40981537 in words is "forty million, nine hundred eighty-one thousand, five hundred thirty-seven".