31003242 has 8 divisors (see below), whose sum is σ = 62006496. Its totient is φ = 10334412.

The previous prime is 31003207. The next prime is 31003243. The reversal of 31003242 is 24230013.

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

31003242 is an admirable number.

It is a super-2 number, since 2×31003242² = 1922402029021128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31003243) 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, 2583598 + ... + 2583609.

It is an arithmetic number, because the mean of its divisors is an integer number (7750812).

Almost surely, 2^31003242 is an apocalyptic number.

31003242 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.

31003242 is a wasteful number, since it uses less digits than its factorization.

31003242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5167212.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 31003242 is about 5568.0554954131. The cubic root of 31003242 is about 314.1490157779.

Adding to 31003242 its reverse (24230013), we get a palindrome (55233255).

The spelling of 31003242 in words is "thirty-one million, three thousand, two hundred forty-two".