40615091 has 16 divisors (see below), whose sum is σ = 48014208. Its totient is φ = 33936000.

The previous prime is 40615087. The next prime is 40615111. The reversal of 40615091 is 19051604.

It is a cyclic number.

It is not a de Polignac number, because 40615091 - 2² = 40615087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40615091.

It is not an unprimeable number, because it can be changed into a prime (40615021) 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, 5516 + ... + 10566.

It is an arithmetic number, because the mean of its divisors is an integer number (3000888).

Almost surely, 2^40615091 is an apocalyptic number.

40615091 is a deficient number, since it is larger than the sum of its proper divisors (7399117).

40615091 is a wasteful number, since it uses less digits than its factorization.

40615091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5122.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 40615091 is about 6372.9970186718. The cubic root of 40615091 is about 343.7392646344.

Adding to 40615091 its reverse (19051604), we get a palindrome (59666695).

The spelling of 40615091 in words is "forty million, six hundred fifteen thousand, ninety-one".