31898317201 has 3 divisors (see below), whose sum is σ = 31898495803. Its totient is φ = 31898138600.

The previous prime is 31898317169. The next prime is 31898317267. The reversal of 31898317201 is 10271389813.

The square root of 31898317201 is 178601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10271389813 = 32587 ⋅315199.

It can be written as a sum of positive squares in only one way, i.e., 2766654801 + 29131662400 = 52599^2 + 170680^2 .

It is not a de Polignac number, because 31898317201 - 2⁵ = 31898317169 is a prime.

It is a super-2 number, since 2×31898317201² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31898317001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 89301 + ... + 267901.

Almost surely, 2^31898317201 is an apocalyptic number.

31898317201 is the 178601-st square number.

31898317201 is the 89301-st centered octagonal number.

It is an amenable number.

31898317201 is a deficient number, since it is larger than the sum of its proper divisors (178602).

31898317201 is an frugal number, since it uses more digits than its factorization.

31898317201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357202 (or 178601 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 31898317201 in words is "thirty-one billion, eight hundred ninety-eight million, three hundred seventeen thousand, two hundred one".