215502823139 has 2 divisors, whose sum is σ = 215502823140. Its totient is φ = 215502823138.

The previous prime is 215502823079. The next prime is 215502823153. The reversal of 215502823139 is 931328205512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215502823139 - 2⁸ = 215502822883 is a prime.

It is a super-2 number, since 2×215502823139² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 215502823096 and 215502823105.

It is not a weakly prime, because it can be changed into another prime (215502523139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107751411569 + 107751411570.

It is an arithmetic number, because the mean of its divisors is an integer number (107751411570).

Almost surely, 2^215502823139 is an apocalyptic number.

215502823139 is a deficient number, since it is larger than the sum of its proper divisors (1).

215502823139 is an equidigital number, since it uses as much as digits as its factorization.

215502823139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 215502823139 in words is "two hundred fifteen billion, five hundred two million, eight hundred twenty-three thousand, one hundred thirty-nine".