31555142 has 8 divisors (see below), whose sum is σ = 48339936. Its totient is φ = 15441832.

The previous prime is 31555141. The next prime is 31555157. The reversal of 31555142 is 24155513.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31555141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167753 + ... + 167940.

It is an arithmetic number, because the mean of its divisors is an integer number (6042492).

Almost surely, 2^31555142 is an apocalyptic number.

31555142 is a deficient number, since it is larger than the sum of its proper divisors (16784794).

31555142 is a wasteful number, since it uses less digits than its factorization.

31555142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335742.

The product of its digits is 3000, while the sum is 26.

The square root of 31555142 is about 5617.3963719859. The cubic root of 31555142 is about 316.0021564239.

The spelling of 31555142 in words is "thirty-one million, five hundred fifty-five thousand, one hundred forty-two".