31423130 has 8 divisors (see below), whose sum is σ = 56561652. Its totient is φ = 12569248.

The previous prime is 31423127. The next prime is 31423159. The reversal of 31423130 is 3132413.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31326409 + 96721 = 5597^2 + 311^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31423099 and 31423108.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1571147 + ... + 1571166.

Almost surely, 2^31423130 is an apocalyptic number.

31423130 is a deficient number, since it is larger than the sum of its proper divisors (25138522).

31423130 is a wasteful number, since it uses less digits than its factorization.

31423130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3142320.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 31423130 is about 5605.6337732677. The cubic root of 31423130 is about 315.5608719174.

Adding to 31423130 its reverse (3132413), we get a palindrome (34555543).

The spelling of 31423130 in words is "thirty-one million, four hundred twenty-three thousand, one hundred thirty".