31475427028 has 6 divisors (see below), whose sum is σ = 55081997306. Its totient is φ = 15737713512.

The previous prime is 31475427001. The next prime is 31475427131. The reversal of 31475427028 is 82072457413.

It can be written as a sum of positive squares in only one way, i.e., 28056920004 + 3418507024 = 167502^2 + 58468^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3934428375 + ... + 3934428382.

Almost surely, 2^31475427028 is an apocalyptic number.

It is an amenable number.

31475427028 is a deficient number, since it is larger than the sum of its proper divisors (23606570278).

31475427028 is a wasteful number, since it uses less digits than its factorization.

31475427028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7868856761 (or 7868856759 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The spelling of 31475427028 in words is "thirty-one billion, four hundred seventy-five million, four hundred twenty-seven thousand, twenty-eight".