31402042424 has 24 divisors (see below), whose sum is σ = 59434415040. Its totient is φ = 15554237328.

The previous prime is 31402042417. The next prime is 31402042429. The reversal of 31402042424 is 42424020413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31402042393 and 31402042402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31402042429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79832 + ... + 263015.

It is an arithmetic number, because the mean of its divisors is an integer number (2476433960).

Almost surely, 2^31402042424 is an apocalyptic number.

It is an amenable number.

31402042424 is a deficient number, since it is larger than the sum of its proper divisors (28032372616).

31402042424 is a wasteful number, since it uses less digits than its factorization.

31402042424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343067 (or 342956 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 31402042424 its reverse (42424020413), we get a palindrome (73826062837).

The spelling of 31402042424 in words is "thirty-one billion, four hundred two million, forty-two thousand, four hundred twenty-four".