40131451 has 4 divisors (see below), whose sum is σ = 40218592. Its totient is φ = 40044312.

The previous prime is 40131449. The next prime is 40131479. The reversal of 40131451 is 15413104.

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 40131451 - 2¹ = 40131449 is a prime.

It is a super-2 number, since 2×40131451² = 3221066718730802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40131851) 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, 42876 + ... + 43801.

It is an arithmetic number, because the mean of its divisors is an integer number (10054648).

Almost surely, 2^40131451 is an apocalyptic number.

40131451 is a deficient number, since it is larger than the sum of its proper divisors (87141).

40131451 is an equidigital number, since it uses as much as digits as its factorization.

40131451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87140.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 40131451 is about 6334.9389105184. The cubic root of 40131451 is about 342.3694097841.

Adding to 40131451 its reverse (15413104), we get a palindrome (55544555).

It can be divided in two parts, 40131 and 451, that multiplied together give a palindrome (18099081).

The spelling of 40131451 in words is "forty million, one hundred thirty-one thousand, four hundred fifty-one".