31911342 has 32 divisors (see below), whose sum is σ = 65197440. Its totient is φ = 10410720.

The previous prime is 31911337. The next prime is 31911343. The reversal of 31911342 is 24311913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31911343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68992 + ... + 69452.

It is an arithmetic number, because the mean of its divisors is an integer number (2037420).

Almost surely, 2^31911342 is an apocalyptic number.

31911342 is an abundant number, since it is smaller than the sum of its proper divisors (33286098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31911342 is a wasteful number, since it uses less digits than its factorization.

31911342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 648, while the sum is 24.

The square root of 31911342 is about 5649.0124800712. The cubic root of 31911342 is about 317.1867396117.

The spelling of 31911342 in words is "thirty-one million, nine hundred eleven thousand, three hundred forty-two".