71556230233 has 2 divisors, whose sum is σ = 71556230234. Its totient is φ = 71556230232.

The previous prime is 71556230167. The next prime is 71556230287. The reversal of 71556230233 is 33203265517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44661214224 + 26895016009 = 211332^2 + 163997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71556230233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71556230192 and 71556230201.

It is not a weakly prime, because it can be changed into another prime (71556230033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35778115116 + 35778115117.

It is an arithmetic number, because the mean of its divisors is an integer number (35778115117).

Almost surely, 2^71556230233 is an apocalyptic number.

It is an amenable number.

71556230233 is a deficient number, since it is larger than the sum of its proper divisors (1).

71556230233 is an equidigital number, since it uses as much as digits as its factorization.

71556230233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 37.

The spelling of 71556230233 in words is "seventy-one billion, five hundred fifty-six million, two hundred thirty thousand, two hundred thirty-three".