31422142 has 4 divisors (see below), whose sum is σ = 47133216. Its totient is φ = 15711070.

The previous prime is 31422101. The next prime is 31422151. The reversal of 31422142 is 24122413.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855534 + ... + 7855537.

It is an arithmetic number, because the mean of its divisors is an integer number (11783304).

Almost surely, 2^31422142 is an apocalyptic number.

31422142 is a deficient number, since it is larger than the sum of its proper divisors (15711074).

31422142 is a wasteful number, since it uses less digits than its factorization.

31422142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15711073.

The product of its digits is 384, while the sum is 19.

The square root of 31422142 is about 5605.5456469464. The cubic root of 31422142 is about 315.5575646147.

Adding to 31422142 its reverse (24122413), we get a palindrome (55544555).

The spelling of 31422142 in words is "thirty-one million, four hundred twenty-two thousand, one hundred forty-two".