31396650481 has 27 divisors (see below), whose sum is σ = 38823473889. Its totient is φ = 25311379968.

The previous prime is 31396650469. The next prime is 31396650511. The reversal of 31396650481 is 18405669313.

The square root of 31396650481 is 177191.

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

It can be written as a sum of positive squares in 4 ways, for example, as 2480625 + 31394169856 = 1575^2 + 177184^2 .

It is not a de Polignac number, because 31396650481 - 2¹³ = 31396642289 is a prime.

It is a super-2 number, since 2×31396650481² (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 (31396650581) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21084985 + ... + 21086473.

Almost surely, 2^31396650481 is an apocalyptic number.

31396650481 is the 177191-st square number.

31396650481 is the 88596-th centered octagonal number.

It is an amenable number.

31396650481 is a deficient number, since it is larger than the sum of its proper divisors (7426823408).

31396650481 is an frugal number, since it uses more digits than its factorization.

31396650481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3026 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 31396650481 in words is "thirty-one billion, three hundred ninety-six million, six hundred fifty thousand, four hundred eighty-one".