31150225 has 12 divisors (see below), whose sum is σ = 38712924. Its totient is φ = 24864320.

The previous prime is 31150219. The next prime is 31150241. The reversal of 31150225 is 52205113.

It can be written as a sum of positive squares in 6 ways, for example, as 1567504 + 29582721 = 1252^2 + 5439^2 .

It is not a de Polignac number, because 31150225 - 2¹¹ = 31148177 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, 12807 + ... + 15043.

It is an arithmetic number, because the mean of its divisors is an integer number (3226077).

Almost surely, 2^31150225 is an apocalyptic number.

It is an amenable number.

31150225 is a deficient number, since it is larger than the sum of its proper divisors (7562699).

31150225 is a wasteful number, since it uses less digits than its factorization.

31150225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2804 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 31150225 is about 5581.2386618026. The cubic root of 31150225 is about 314.6446820789.

Adding to 31150225 its reverse (52205113), we get a palindrome (83355338).

It can be divided in two parts, 31150 and 225, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 31150225 in words is "thirty-one million, one hundred fifty thousand, two hundred twenty-five".