240420013631 has 32 divisors (see below), whose sum is σ = 291626519040. Its totient is φ = 193487616000.

The previous prime is 240420013627. The next prime is 240420013637. The reversal of 240420013631 is 136310024042.

It is not a de Polignac number, because 240420013631 - 2² = 240420013627 is a prime.

It is a super-2 number, since 2×240420013631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240420013631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240420013637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161463335 + ... + 161464823.

It is an arithmetic number, because the mean of its divisors is an integer number (9113328720).

Almost surely, 2^240420013631 is an apocalyptic number.

240420013631 is a deficient number, since it is larger than the sum of its proper divisors (51206505409).

240420013631 is a wasteful number, since it uses less digits than its factorization.

240420013631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 240420013631 its reverse (136310024042), we get a palindrome (376730037673).

The spelling of 240420013631 in words is "two hundred forty billion, four hundred twenty million, thirteen thousand, six hundred thirty-one".