40021430131 has 4 divisors (see below), whose sum is σ = 40102940664. Its totient is φ = 39939919600.

The previous prime is 40021430129. The next prime is 40021430149. The reversal of 40021430131 is 13103412004.

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 40021430131 - 2¹ = 40021430129 is a prime.

It is a super-2 number, since 2×40021430131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40021430099 and 40021430108.

It is not an unprimeable number, because it can be changed into a prime (40021430191) 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, 40754530 + ... + 40755511.

It is an arithmetic number, because the mean of its divisors is an integer number (10025735166).

Almost surely, 2^40021430131 is an apocalyptic number.

40021430131 is a deficient number, since it is larger than the sum of its proper divisors (81510533).

40021430131 is an equidigital number, since it uses as much as digits as its factorization.

40021430131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81510532.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 40021430131 its reverse (13103412004), we get a palindrome (53124842135).

The spelling of 40021430131 in words is "forty billion, twenty-one million, four hundred thirty thousand, one hundred thirty-one".