263553427331 has 4 divisors (see below), whose sum is σ = 263558612064. Its totient is φ = 263548242600.

The previous prime is 263553427309. The next prime is 263553427349. The reversal of 263553427331 is 133724355362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263553427331 is a prime.

It is a super-2 number, since 2×263553427331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263553427231) 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, 2515355 + ... + 2618036.

It is an arithmetic number, because the mean of its divisors is an integer number (65889653016).

Almost surely, 2^263553427331 is an apocalyptic number.

263553427331 is a deficient number, since it is larger than the sum of its proper divisors (5184733).

263553427331 is an equidigital number, since it uses as much as digits as its factorization.

263553427331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184732.

The product of its digits is 1360800, while the sum is 44.

The spelling of 263553427331 in words is "two hundred sixty-three billion, five hundred fifty-three million, four hundred twenty-seven thousand, three hundred thirty-one".