131000533109 has 2 divisors, whose sum is σ = 131000533110. Its totient is φ = 131000533108.

The previous prime is 131000533093. The next prime is 131000533133. The reversal of 131000533109 is 901335000131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92042458225 + 38958074884 = 303385^2 + 197378^2 .

It is a cyclic number.

It is not a de Polignac number, because 131000533109 - 2⁴ = 131000533093 is a prime.

It is a super-2 number, since 2×131000533109² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131000533159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65500266554 + 65500266555.

It is an arithmetic number, because the mean of its divisors is an integer number (65500266555).

Almost surely, 2^131000533109 is an apocalyptic number.

It is an amenable number.

131000533109 is a deficient number, since it is larger than the sum of its proper divisors (1).

131000533109 is an equidigital number, since it uses as much as digits as its factorization.

131000533109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1215, while the sum is 26.

The spelling of 131000533109 in words is "one hundred thirty-one billion, five hundred thirty-three thousand, one hundred nine".