31430146 has 16 divisors (see below), whose sum is σ = 51517440. Its totient is φ = 14262480.

The previous prime is 31430143. The next prime is 31430177. The reversal of 31430146 is 64103413.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (31430143) 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, 23935 + ... + 25213.

It is an arithmetic number, because the mean of its divisors is an integer number (3219840).

Almost surely, 2^31430146 is an apocalyptic number.

31430146 is a deficient number, since it is larger than the sum of its proper divisors (20087294).

31430146 is a wasteful number, since it uses less digits than its factorization.

31430146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 31430146 is about 5606.2595373386. The cubic root of 31430146 is about 315.5843557897.

Adding to 31430146 its reverse (64103413), we get a palindrome (95533559).

The spelling of 31430146 in words is "thirty-one million, four hundred thirty thousand, one hundred forty-six".