262161631 has 2 divisors, whose sum is σ = 262161632. Its totient is φ = 262161630.

The previous prime is 262161617. The next prime is 262161643. The reversal of 262161631 is 136161262.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-262161631 is a prime.

It is a super-2 number, since 2×262161631² = 137457441537160322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 262161631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (262161611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131080815 + 131080816.

It is an arithmetic number, because the mean of its divisors is an integer number (131080816).

Almost surely, 2^262161631 is an apocalyptic number.

262161631 is a deficient number, since it is larger than the sum of its proper divisors (1).

262161631 is an equidigital number, since it uses as much as digits as its factorization.

262161631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 262161631 is about 16191.4060847105. The cubic root of 262161631 is about 640.0143478229.

The spelling of 262161631 in words is "two hundred sixty-two million, one hundred sixty-one thousand, six hundred thirty-one".