263021131 has 2 divisors, whose sum is σ = 263021132. Its totient is φ = 263021130.

The previous prime is 263021111. The next prime is 263021137. The reversal of 263021131 is 131120362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263021131 is a prime.

It is a super-2 number, since 2×263021131² = 138360230705038322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 263021099 and 263021108.

It is not a weakly prime, because it can be changed into another prime (263021137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131510565 + 131510566.

It is an arithmetic number, because the mean of its divisors is an integer number (131510566).

Almost surely, 2^263021131 is an apocalyptic number.

263021131 is a deficient number, since it is larger than the sum of its proper divisors (1).

263021131 is an equidigital number, since it uses as much as digits as its factorization.

263021131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 263021131 is about 16217.9262237809. The cubic root of 263021131 is about 640.7130163771.

Adding to 263021131 its reverse (131120362), we get a palindrome (394141493).

The spelling of 263021131 in words is "two hundred sixty-three million, twenty-one thousand, one hundred thirty-one".