31290052 has 12 divisors (see below), whose sum is σ = 56093436. Its totient is φ = 15263360.

The previous prime is 31290029. The next prime is 31290059. The reversal of 31290052 is 25009213.

It can be written as a sum of positive squares in 2 ways, for example, as 12489156 + 18800896 = 3534^2 + 4336^2 .

It is not an unprimeable number, because it can be changed into a prime (31290059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95233 + ... + 95560.

It is an arithmetic number, because the mean of its divisors is an integer number (4674453).

Almost surely, 2^31290052 is an apocalyptic number.

It is an amenable number.

31290052 is a deficient number, since it is larger than the sum of its proper divisors (24803384).

31290052 is a wasteful number, since it uses less digits than its factorization.

31290052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190838 (or 190836 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 31290052 is about 5593.7511564245. The cubic root of 31290052 is about 315.1147713127.

Adding to 31290052 its reverse (25009213), we get a palindrome (56299265).

The spelling of 31290052 in words is "thirty-one million, two hundred ninety thousand, fifty-two".