542155811 has 2 divisors, whose sum is σ = 542155812. Its totient is φ = 542155810.

The previous prime is 542155777. The next prime is 542155813. The reversal of 542155811 is 118551245.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542155811 - 2²⁶ = 475046947 is a prime.

Together with 542155813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (542155813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271077905 + 271077906.

It is an arithmetic number, because the mean of its divisors is an integer number (271077906).

Almost surely, 2^542155811 is an apocalyptic number.

542155811 is a deficient number, since it is larger than the sum of its proper divisors (1).

542155811 is an equidigital number, since it uses as much as digits as its factorization.

542155811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8000, while the sum is 32.

The square root of 542155811 is about 23284.2395409427. The cubic root of 542155811 is about 815.4075074510.

The spelling of 542155811 in words is "five hundred forty-two million, one hundred fifty-five thousand, eight hundred eleven".