31380230 has 32 divisors (see below), whose sum is σ = 65620800. Its totient is φ = 10581120.

The previous prime is 31380227. The next prime is 31380247. The reversal of 31380230 is 3208313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 596 + ... + 7944.

It is an arithmetic number, because the mean of its divisors is an integer number (2050650).

Almost surely, 2^31380230 is an apocalyptic number.

31380230 is an abundant number, since it is smaller than the sum of its proper divisors (34240570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31380230 is a wasteful number, since it uses less digits than its factorization.

31380230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 31380230 is about 5601.8059587958. The cubic root of 31380230 is about 315.4172014562.

Adding to 31380230 its reverse (3208313), we get a palindrome (34588543).

The spelling of 31380230 in words is "thirty-one million, three hundred eighty thousand, two hundred thirty".