31143420242 has 8 divisors (see below), whose sum is σ = 50961960432. Its totient is φ = 14156100100.

The previous prime is 31143420223. The next prime is 31143420263. The reversal of 31143420242 is 24202434113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 707804984 + ... + 707805027.

It is an arithmetic number, because the mean of its divisors is an integer number (6370245054).

Almost surely, 2^31143420242 is an apocalyptic number.

31143420242 is a deficient number, since it is larger than the sum of its proper divisors (19818540190).

31143420242 is a wasteful number, since it uses less digits than its factorization.

31143420242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415610024.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31143420242 its reverse (24202434113), we get a palindrome (55345854355).

The spelling of 31143420242 in words is "thirty-one billion, one hundred forty-three million, four hundred twenty thousand, two hundred forty-two".