31475673146 has 4 divisors (see below), whose sum is σ = 47213509722. Its totient is φ = 15737836572.

The previous prime is 31475673137. The next prime is 31475673149. The reversal of 31475673146 is 64137657413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27469416121 + 4006257025 = 165739^2 + 63295^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31475673146.

It is not an unprimeable number, because it can be changed into a prime (31475673149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7868918285 + ... + 7868918288.

Almost surely, 2^31475673146 is an apocalyptic number.

31475673146 is a deficient number, since it is larger than the sum of its proper divisors (15737836576).

31475673146 is a wasteful number, since it uses less digits than its factorization.

31475673146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15737836575.

The product of its digits is 1270080, while the sum is 47.

The spelling of 31475673146 in words is "thirty-one billion, four hundred seventy-five million, six hundred seventy-three thousand, one hundred forty-six".