31004222 has 4 divisors (see below), whose sum is σ = 46506336. Its totient is φ = 15502110.

The previous prime is 31004221. The next prime is 31004231. The reversal of 31004222 is 22240013.

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

It is a super-2 number, since 2×31004222² = 1922523563650568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31004197 and 31004206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31004221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7751054 + ... + 7751057.

It is an arithmetic number, because the mean of its divisors is an integer number (11626584).

Almost surely, 2^31004222 is an apocalyptic number.

31004222 is a deficient number, since it is larger than the sum of its proper divisors (15502114).

31004222 is a wasteful number, since it uses less digits than its factorization.

31004222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15502113.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31004222 is about 5568.1434967141. The cubic root of 31004222 is about 314.1523257844.

Adding to 31004222 its reverse (22240013), we get a palindrome (53244235).

The spelling of 31004222 in words is "thirty-one million, four thousand, two hundred twenty-two".