31887602041 has 3 divisors (see below), whose sum is σ = 31887780613. Its totient is φ = 31887423470.

The previous prime is 31887602011. The next prime is 31887602077. The reversal of 31887602041 is 14020678813.

The square root of 31887602041 is 178571.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 31887602041 - 2¹³ = 31887593849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31887601985 and 31887602003.

It is not an unprimeable number, because it can be changed into a prime (31887602011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 89286 + ... + 267856.

Almost surely, 2^31887602041 is an apocalyptic number.

31887602041 is the 178571-st square number.

31887602041 is the 89286-th centered octagonal number.

It is an amenable number.

31887602041 is a deficient number, since it is larger than the sum of its proper divisors (178572).

31887602041 is an frugal number, since it uses more digits than its factorization.

31887602041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357142 (or 178571 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 31887602041 in words is "thirty-one billion, eight hundred eighty-seven million, six hundred two thousand, forty-one".