31423476242 has 4 divisors (see below), whose sum is σ = 47135214366. Its totient is φ = 15711738120.

The previous prime is 31423476241. The next prime is 31423476251. The reversal of 31423476242 is 24267432413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24560844961 + 6862631281 = 156719^2 + 82841^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31423476196 and 31423476205.

It is not an unprimeable number, because it can be changed into a prime (31423476241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855869059 + ... + 7855869062.

Almost surely, 2^31423476242 is an apocalyptic number.

31423476242 is a deficient number, since it is larger than the sum of its proper divisors (15711738124).

31423476242 is a wasteful number, since it uses less digits than its factorization.

31423476242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15711738123.

The product of its digits is 193536, while the sum is 38.

The spelling of 31423476242 in words is "thirty-one billion, four hundred twenty-three million, four hundred seventy-six thousand, two hundred forty-two".