545871631 has 2 divisors, whose sum is σ = 545871632. Its totient is φ = 545871630.

The previous prime is 545871607. The next prime is 545871659. The reversal of 545871631 is 136178545.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 545871631 - 2²⁷ = 411653903 is a prime.

It is a super-2 number, since 2×545871631² = 595951675061200322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545872631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272935815 + 272935816.

It is an arithmetic number, because the mean of its divisors is an integer number (272935816).

Almost surely, 2^545871631 is an apocalyptic number.

545871631 is a deficient number, since it is larger than the sum of its proper divisors (1).

545871631 is an equidigital number, since it uses as much as digits as its factorization.

545871631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 40.

The square root of 545871631 is about 23363.8958866025. The cubic root of 545871631 is about 817.2661438968.

The spelling of 545871631 in words is "five hundred forty-five million, eight hundred seventy-one thousand, six hundred thirty-one".