31103242 has 4 divisors (see below), whose sum is σ = 46654866. Its totient is φ = 15551620.

The previous prime is 31103239. The next prime is 31103257. The reversal of 31103242 is 24230113.

It is a happy number.

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., 28826161 + 2277081 = 5369^2 + 1509^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7775809 + ... + 7775812.

Almost surely, 2^31103242 is an apocalyptic number.

31103242 is a deficient number, since it is larger than the sum of its proper divisors (15551624).

31103242 is a wasteful number, since it uses less digits than its factorization.

31103242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15551623.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31103242 is about 5577.0280616113. The cubic root of 31103242 is about 314.4864126007.

Adding to 31103242 its reverse (24230113), we get a palindrome (55333355).

The spelling of 31103242 in words is "thirty-one million, one hundred three thousand, two hundred forty-two".