155223932771 has 2 divisors, whose sum is σ = 155223932772. Its totient is φ = 155223932770.

The previous prime is 155223932761. The next prime is 155223932777. The reversal of 155223932771 is 177239322551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155223932771 - 2²⁶ = 155156823907 is a prime.

It is not a weakly prime, because it can be changed into another prime (155223932777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77611966385 + 77611966386.

It is an arithmetic number, because the mean of its divisors is an integer number (77611966386).

Almost surely, 2^155223932771 is an apocalyptic number.

155223932771 is a deficient number, since it is larger than the sum of its proper divisors (1).

155223932771 is an equidigital number, since it uses as much as digits as its factorization.

155223932771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The spelling of 155223932771 in words is "one hundred fifty-five billion, two hundred twenty-three million, nine hundred thirty-two thousand, seven hundred seventy-one".