31400230 has 16 divisors (see below), whose sum is σ = 57723840. Its totient is φ = 12292672.

The previous prime is 31400189. The next prime is 31400231. The reversal of 31400230 is 3200413.

It is a self number, because there is not a number n which added to its sum of digits gives 31400230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32935 + ... + 33874.

It is an arithmetic number, because the mean of its divisors is an integer number (3607740).

Almost surely, 2^31400230 is an apocalyptic number.

31400230 is a deficient number, since it is larger than the sum of its proper divisors (26323610).

31400230 is a wasteful number, since it uses less digits than its factorization.

31400230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66863.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31400230 is about 5603.5908130412. The cubic root of 31400230 is about 315.4841969744.

Adding to 31400230 its reverse (3200413), we get a palindrome (34600643).

The spelling of 31400230 in words is "thirty-one million, four hundred thousand, two hundred thirty".