31430642 has 8 divisors (see below), whose sum is σ = 47286876. Its totient is φ = 15668352.

The previous prime is 31430599. The next prime is 31430669. The reversal of 31430642 is 24603413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29495761 + 1934881 = 5431^2 + 1391^2 .

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, 22643 + ... + 23990.

Almost surely, 2^31430642 is an apocalyptic number.

31430642 is a deficient number, since it is larger than the sum of its proper divisors (15856234).

31430642 is a wasteful number, since it uses less digits than its factorization.

31430642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46972.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 31430642 is about 5606.3037734322. The cubic root of 31430642 is about 315.5860158628.

The spelling of 31430642 in words is "thirty-one million, four hundred thirty thousand, six hundred forty-two".