263621051 has 2 divisors, whose sum is σ = 263621052. Its totient is φ = 263621050.

The previous prime is 263620957. The next prime is 263621053. The reversal of 263621051 is 150126362.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263621051 is a prime.

Together with 263621053, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 263621051.

It is not a weakly prime, because it can be changed into another prime (263621053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131810525 + 131810526.

It is an arithmetic number, because the mean of its divisors is an integer number (131810526).

Almost surely, 2^263621051 is an apocalyptic number.

263621051 is a deficient number, since it is larger than the sum of its proper divisors (1).

263621051 is an equidigital number, since it uses as much as digits as its factorization.

263621051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 263621051 is about 16236.4112721993. The cubic root of 263621051 is about 641.1997766131.

The spelling of 263621051 in words is "two hundred sixty-three million, six hundred twenty-one thousand, fifty-one".