263213550 has 120 divisors (see below), whose sum is σ = 774566496. Its totient is φ = 66044160.

The previous prime is 263213549. The next prime is 263213551. The reversal of 263213550 is 55312362.

It is an interprime number because it is at equal distance from previous prime (263213549) and next prime (263213551).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263213551) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 66939 + ... + 70761.

Almost surely, 2^263213550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263213550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387283248).

263213550 is an abundant number, since it is smaller than the sum of its proper divisors (511352946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

263213550 is a wasteful number, since it uses less digits than its factorization.

263213550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3864 (or 3850 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 263213550 is about 16223.8574328056. The cubic root of 263213550 is about 640.8692209446.

The spelling of 263213550 in words is "two hundred sixty-three million, two hundred thirteen thousand, five hundred fifty".