31443134146 has 16 divisors (see below), whose sum is σ = 48298565304. Its totient is φ = 15346624384.

The previous prime is 31443134081. The next prime is 31443134171. The reversal of 31443134146 is 64143134413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31440609225 + 2524921 = 177315^2 + 1589^2 .

It is a super-2 number, since 2×31443134146² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 731995 + ... + 773758.

Almost surely, 2^31443134146 is an apocalyptic number.

31443134146 is a deficient number, since it is larger than the sum of its proper divisors (16855431158).

31443134146 is a wasteful number, since it uses less digits than its factorization.

31443134146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506005.

The product of its digits is 41472, while the sum is 34.

Adding to 31443134146 its reverse (64143134413), we get a palindrome (95586268559).

The spelling of 31443134146 in words is "thirty-one billion, four hundred forty-three million, one hundred thirty-four thousand, one hundred forty-six".