263401431 has 8 divisors (see below), whose sum is σ = 352498944. Its totient is φ = 174952440.

The previous prime is 263401423. The next prime is 263401441. The reversal of 263401431 is 134104362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 263401431 - 2³ = 263401423 is a prime.

It is a super-2 number, since 2×263401431² = 138760627705695522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263401441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161181 + ... + 162806.

It is an arithmetic number, because the mean of its divisors is an integer number (44062368).

Almost surely, 2^263401431 is an apocalyptic number.

263401431 is a deficient number, since it is larger than the sum of its proper divisors (89097513).

263401431 is a wasteful number, since it uses less digits than its factorization.

263401431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324261.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 263401431 is about 16229.6466689820. The cubic root of 263401431 is about 641.0216681530.

Adding to 263401431 its reverse (134104362), we get a palindrome (397505793).

The spelling of 263401431 in words is "two hundred sixty-three million, four hundred one thousand, four hundred thirty-one".