263428031 has 4 divisors (see below), whose sum is σ = 265439064. Its totient is φ = 261417000.

The previous prime is 263428021. The next prime is 263428037. The reversal of 263428031 is 130824362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263428031 - 2¹⁸ = 263165887 is a prime.

It is a super-2 number, since 2×263428031² = 138788655033073922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263427985 and 263428003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263428037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1005320 + ... + 1005581.

It is an arithmetic number, because the mean of its divisors is an integer number (66359766).

Almost surely, 2^263428031 is an apocalyptic number.

263428031 is a deficient number, since it is larger than the sum of its proper divisors (2011033).

263428031 is a wasteful number, since it uses less digits than its factorization.

263428031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011032.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 263428031 is about 16230.4661362513. The cubic root of 263428031 is about 641.0432456141.

The spelling of 263428031 in words is "two hundred sixty-three million, four hundred twenty-eight thousand, thirty-one".