555142391 has 2 divisors, whose sum is σ = 555142392. Its totient is φ = 555142390.

The previous prime is 555142363. The next prime is 555142403. The reversal of 555142391 is 193241555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-555142391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (555142891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277571195 + 277571196.

It is an arithmetic number, because the mean of its divisors is an integer number (277571196).

Almost surely, 2^555142391 is an apocalyptic number.

555142391 is a deficient number, since it is larger than the sum of its proper divisors (1).

555142391 is an equidigital number, since it uses as much as digits as its factorization.

555142391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27000, while the sum is 35.

The square root of 555142391 is about 23561.4598656365. The cubic root of 555142391 is about 821.8668506201.

The spelling of 555142391 in words is "five hundred fifty-five million, one hundred forty-two thousand, three hundred ninety-one".