155223143 has 2 divisors, whose sum is σ = 155223144. Its totient is φ = 155223142.

The previous prime is 155223127. The next prime is 155223151. The reversal of 155223143 is 341322551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155223143 - 2⁴ = 155223127 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155223643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77611571 + 77611572.

It is an arithmetic number, because the mean of its divisors is an integer number (77611572).

Almost surely, 2^155223143 is an apocalyptic number.

155223143 is a deficient number, since it is larger than the sum of its proper divisors (1).

155223143 is an equidigital number, since it uses as much as digits as its factorization.

155223143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 155223143 is about 12458.8580134778. The cubic root of 155223143 is about 537.4261869435.

Adding to 155223143 its reverse (341322551), we get a palindrome (496545694).

The spelling of 155223143 in words is "one hundred fifty-five million, two hundred twenty-three thousand, one hundred forty-three".