31273142 has 16 divisors (see below), whose sum is σ = 48079872. Its totient is φ = 15249000.

The previous prime is 31273139. The next prime is 31273147. The reversal of 31273142 is 24137213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31273147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41267 + ... + 42017.

It is an arithmetic number, because the mean of its divisors is an integer number (3004992).

Almost surely, 2^31273142 is an apocalyptic number.

31273142 is a deficient number, since it is larger than the sum of its proper divisors (16806730).

31273142 is a wasteful number, since it uses less digits than its factorization.

31273142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its digits is 1008, while the sum is 23.

The square root of 31273142 is about 5592.2394440868. The cubic root of 31273142 is about 315.0579955365.

The spelling of 31273142 in words is "thirty-one million, two hundred seventy-three thousand, one hundred forty-two".