31542442 has 8 divisors (see below), whose sum is σ = 47675232. Its totient is φ = 15650700.

The previous prime is 31542439. The next prime is 31542457. The reversal of 31542442 is 24424513.

It is a happy number.

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, 59934 + ... + 60457.

It is an arithmetic number, because the mean of its divisors is an integer number (5959404).

Almost surely, 2^31542442 is an apocalyptic number.

31542442 is a deficient number, since it is larger than the sum of its proper divisors (16132790).

31542442 is a wasteful number, since it uses less digits than its factorization.

31542442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120524.

The product of its digits is 3840, while the sum is 25.

The square root of 31542442 is about 5616.2658412864. The cubic root of 31542442 is about 315.9597569326.

Adding to 31542442 its reverse (24424513), we get a palindrome (55966955).

The spelling of 31542442 in words is "thirty-one million, five hundred forty-two thousand, four hundred forty-two".