31504128001 has 2 divisors, whose sum is σ = 31504128002. Its totient is φ = 31504128000.

The previous prime is 31504127957. The next prime is 31504128013. The reversal of 31504128001 is 10082140513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31305994225 + 198133776 = 176935^2 + 14076^2 .

It is a cyclic number.

It is not a de Polignac number, because 31504128001 - 2²³ = 31495739393 is a prime.

It is a super-2 number, since 2×31504128001² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31504128041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15752064000 + 15752064001.

It is an arithmetic number, because the mean of its divisors is an integer number (15752064001).

Almost surely, 2^31504128001 is an apocalyptic number.

It is an amenable number.

31504128001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31504128001 is an equidigital number, since it uses as much as digits as its factorization.

31504128001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

Adding to 31504128001 its reverse (10082140513), we get a palindrome (41586268514).

The spelling of 31504128001 in words is "thirty-one billion, five hundred four million, one hundred twenty-eight thousand, one".