40130291 has 4 divisors (see below), whose sum is σ = 40362432. Its totient is φ = 39898152.

The previous prime is 40130281. The next prime is 40130323. The reversal of 40130291 is 19203104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40130291 - 2²² = 35935987 is a prime.

It is a super-2 number, since 2×40130291² = 3220880511489362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40130201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115811 + ... + 116156.

It is an arithmetic number, because the mean of its divisors is an integer number (10090608).

Almost surely, 2^40130291 is an apocalyptic number.

40130291 is a deficient number, since it is larger than the sum of its proper divisors (232141).

40130291 is a wasteful number, since it uses less digits than its factorization.

40130291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232140.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 40130291 is about 6334.8473541199. The cubic root of 40130291 is about 342.3661110218.

Adding to 40130291 its reverse (19203104), we get a palindrome (59333395).

The spelling of 40130291 in words is "forty million, one hundred thirty thousand, two hundred ninety-one".