40313091 has 48 divisors (see below), whose sum is σ = 68538624. Its totient is φ = 20621952.

The previous prime is 40313087. The next prime is 40313101. The reversal of 40313091 is 19031304.

It is not a de Polignac number, because 40313091 - 2² = 40313087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40313011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 131160 + ... + 131466.

It is an arithmetic number, because the mean of its divisors is an integer number (1427888).

Almost surely, 2^40313091 is an apocalyptic number.

40313091 is a deficient number, since it is larger than the sum of its proper divisors (28225533).

40313091 is a wasteful number, since it uses less digits than its factorization.

40313091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 40313091 is about 6349.2590906341. The cubic root of 40313091 is about 342.8851681208.

Adding to 40313091 its reverse (19031304), we get a palindrome (59344395).

The spelling of 40313091 in words is "forty million, three hundred thirteen thousand, ninety-one".