215175137131 has 2 divisors, whose sum is σ = 215175137132. Its totient is φ = 215175137130.

The previous prime is 215175137117. The next prime is 215175137141. The reversal of 215175137131 is 131731571512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215175137131 is a prime.

It is a super-2 number, since 2×215175137131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215175137101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107587568565 + 107587568566.

It is an arithmetic number, because the mean of its divisors is an integer number (107587568566).

Almost surely, 2^215175137131 is an apocalyptic number.

215175137131 is a deficient number, since it is larger than the sum of its proper divisors (1).

215175137131 is an equidigital number, since it uses as much as digits as its factorization.

215175137131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 37.

The spelling of 215175137131 in words is "two hundred fifteen billion, one hundred seventy-five million, one hundred thirty-seven thousand, one hundred thirty-one".