31212042 has 16 divisors (see below), whose sum is σ = 63752832. Its totient is φ = 10182560.

The previous prime is 31212037. The next prime is 31212043. The reversal of 31212042 is 24021213.

It is not an unprimeable number, because it can be changed into a prime (31212043) 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, 55059 + ... + 55622.

It is an arithmetic number, because the mean of its divisors is an integer number (3984552).

Almost surely, 2^31212042 is an apocalyptic number.

31212042 is an abundant number, since it is smaller than the sum of its proper divisors (32540790).

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

31212042 is a wasteful number, since it uses less digits than its factorization.

31212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110733.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31212042 is about 5586.7738454317. The cubic root of 31212042 is about 314.8526799149.

Adding to 31212042 its reverse (24021213), we get a palindrome (55233255).

The spelling of 31212042 in words is "thirty-one million, two hundred twelve thousand, forty-two".