31342138 has 8 divisors (see below), whose sum is σ = 48013632. Its totient is φ = 15337596.

The previous prime is 31342121. The next prime is 31342139. The reversal of 31342138 is 83124313.

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

It is a super-2 number, since 2×31342138² = 1964659228822088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31342139) 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, 166620 + ... + 166807.

It is an arithmetic number, because the mean of its divisors is an integer number (6001704).

Almost surely, 2^31342138 is an apocalyptic number.

31342138 is a deficient number, since it is larger than the sum of its proper divisors (16671494).

31342138 is a wasteful number, since it uses less digits than its factorization.

31342138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333476.

The product of its digits is 1728, while the sum is 25.

The square root of 31342138 is about 5598.4049514125. The cubic root of 31342138 is about 315.2895230115.

The spelling of 31342138 in words is "thirty-one million, three hundred forty-two thousand, one hundred thirty-eight".