31200042 has 8 divisors (see below), whose sum is σ = 62400096. Its totient is φ = 10400012.

The previous prime is 31200007. The next prime is 31200061. The reversal of 31200042 is 24000213.

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

31200042 is an admirable number.

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, 2599998 + ... + 2600009.

It is an arithmetic number, because the mean of its divisors is an integer number (7800012).

Almost surely, 2^31200042 is an apocalyptic number.

31200042 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31200042 is a wasteful number, since it uses less digits than its factorization.

31200042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200012.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 31200042 is about 5585.6997771094. The cubic root of 31200042 is about 314.8123245881.

Adding to 31200042 its reverse (24000213), we get a palindrome (55200255).

The spelling of 31200042 in words is "thirty-one million, two hundred thousand, forty-two".