531240981942 has 64 divisors (see below), whose sum is σ = 1227364959744. Its totient is φ = 151498621440.

The previous prime is 531240981941. The next prime is 531240982009. The reversal of 531240981942 is 249189042135.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 531240981891 and 531240981900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531240981941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22795248 + ... + 22818540.

It is an arithmetic number, because the mean of its divisors is an integer number (19177577496).

Almost surely, 2^531240981942 is an apocalyptic number.

531240981942 is an abundant number, since it is smaller than the sum of its proper divisors (696123977802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531240981942 is a wasteful number, since it uses less digits than its factorization.

531240981942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43653.

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 531240981942 in words is "five hundred thirty-one billion, two hundred forty million, nine hundred eighty-one thousand, nine hundred forty-two".