31652323921 has 9 divisors (see below), whose sum is σ = 32027986011. Its totient is φ = 31281023664.

The previous prime is 31652323907. The next prime is 31652323939. The reversal of 31652323921 is 12932325613.

The square root of 31652323921 is 177911.

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

It can be written as a sum of positive squares in only one way, i.e., 6077917521 + 25574406400 = 77961^2 + 159920^2 .

It is not a de Polignac number, because 31652323921 - 2¹³ = 31652315729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31652323721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 15833080 + ... + 15835078.

Almost surely, 2^31652323921 is an apocalyptic number.

31652323921 is the 177911-st square number.

31652323921 is the 88956-th centered octagonal number.

It is an amenable number.

31652323921 is a deficient number, since it is larger than the sum of its proper divisors (375662090).

31652323921 is an frugal number, since it uses more digits than its factorization.

31652323921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176 (or 2088 counting only the distinct ones).

The product of its digits is 58320, while the sum is 37.

The spelling of 31652323921 in words is "thirty-one billion, six hundred fifty-two million, three hundred twenty-three thousand, nine hundred twenty-one".