31664053013 has 8 divisors (see below), whose sum is σ = 32771659800. Its totient is φ = 30557495808.

The previous prime is 31664052989. The next prime is 31664053063. The reversal of 31664053013 is 31035046613.

It can be written as a sum of positive squares in 4 ways, for example, as 14571628369 + 17092424644 = 120713^2 + 130738^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31664053013 - 2¹⁶ = 31663987477 is a prime.

It is a super-2 number, since 2×31664053013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31664053063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200756 + ... + 321917.

It is an arithmetic number, because the mean of its divisors is an integer number (4096457475).

Almost surely, 2^31664053013 is an apocalyptic number.

It is an amenable number.

31664053013 is a deficient number, since it is larger than the sum of its proper divisors (1107606787).

31664053013 is a wasteful number, since it uses less digits than its factorization.

31664053013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 524791.

The product of its (nonzero) digits is 19440, while the sum is 32.

Adding to 31664053013 its reverse (31035046613), we get a palindrome (62699099626).

Subtracting from 31664053013 its reverse (31035046613), we obtain a square (629006400 = 25080²).

The spelling of 31664053013 in words is "thirty-one billion, six hundred sixty-four million, fifty-three thousand, thirteen".