31004242 has 4 divisors (see below), whose sum is σ = 46506366. Its totient is φ = 15502120.

The previous prime is 31004231. The next prime is 31004249. The reversal of 31004242 is 24240013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 101761 = 5559^2 + 319^2 .

It is a super-2 number, since 2×31004242² = 1922526043989128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31004249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7751059 + ... + 7751062.

Almost surely, 2^31004242 is an apocalyptic number.

31004242 is a deficient number, since it is larger than the sum of its proper divisors (15502124).

31004242 is a wasteful number, since it uses less digits than its factorization.

31004242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15502123.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 31004242 is about 5568.1452926446. The cubic root of 31004242 is about 314.1523933348.

Adding to 31004242 its reverse (24240013), we get a palindrome (55244255).

The spelling of 31004242 in words is "thirty-one million, four thousand, two hundred forty-two".