31430414242 has 4 divisors (see below), whose sum is σ = 47145621366. Its totient is φ = 15715207120.

The previous prime is 31430414231. The next prime is 31430414299. The reversal of 31430414242 is 24241403413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24241403413 = 153191 ⋅158243.

It can be written as a sum of positive squares in only one way, i.e., 31103202321 + 327211921 = 176361^2 + 18089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31430414242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857603559 + ... + 7857603562.

Almost surely, 2^31430414242 is an apocalyptic number.

31430414242 is a deficient number, since it is larger than the sum of its proper divisors (15715207124).

31430414242 is a wasteful number, since it uses less digits than its factorization.

31430414242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15715207123.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 31430414242 its reverse (24241403413), we get a palindrome (55671817655).

The spelling of 31430414242 in words is "thirty-one billion, four hundred thirty million, four hundred fourteen thousand, two hundred forty-two".