31042225 has 12 divisors (see below), whose sum is σ = 38623644. Its totient is φ = 24749120.

The previous prime is 31042217. The next prime is 31042241. The reversal of 31042225 is 52224013.

It can be written as a sum of positive squares in 6 ways, for example, as 1871424 + 29170801 = 1368^2 + 5401^2 .

It is not a de Polignac number, because 31042225 - 2³ = 31042217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5967 + ... + 9883.

It is an arithmetic number, because the mean of its divisors is an integer number (3218637).

Almost surely, 2^31042225 is an apocalyptic number.

It is an amenable number.

31042225 is a deficient number, since it is larger than the sum of its proper divisors (7581419).

31042225 is a wasteful number, since it uses less digits than its factorization.

31042225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4244 (or 4239 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 31042225 is about 5571.5549894083. The cubic root of 31042225 is about 314.2806293451.

Adding to 31042225 its reverse (52224013), we get a palindrome (83266238).

It can be divided in two parts, 3104 and 2225, that added together give a square (5329 = 73²).

The spelling of 31042225 in words is "thirty-one million, forty-two thousand, two hundred twenty-five".