31406146 has 4 divisors (see below), whose sum is σ = 47109222. Its totient is φ = 15703072.

The previous prime is 31406119. The next prime is 31406147. The reversal of 31406146 is 64160413.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64160413 = 3803 ⋅16871.

It can be written as a sum of positive squares in only one way, i.e., 30969225 + 436921 = 5565^2 + 661^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31406146.

It is not an unprimeable number, because it can be changed into a prime (31406147) 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 as a sum of consecutive naturals, namely, 7851535 + ... + 7851538.

Almost surely, 2^31406146 is an apocalyptic number.

31406146 is a deficient number, since it is larger than the sum of its proper divisors (15703076).

31406146 is a wasteful number, since it uses less digits than its factorization.

31406146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15703075.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31406146 is about 5604.1186639828. The cubic root of 31406146 is about 315.5040087964.

Adding to 31406146 its reverse (64160413), we get a palindrome (95566559).

The spelling of 31406146 in words is "thirty-one million, four hundred six thousand, one hundred forty-six".