263231550 has 144 divisors (see below), whose sum is σ = 764281440. Its totient is φ = 64753920.

The previous prime is 263231533. The next prime is 263231557. The reversal of 263231550 is 55132362.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263231557) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 299712 + ... + 300588.

It is an arithmetic number, because the mean of its divisors is an integer number (5307510).

Almost surely, 2^263231550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263231550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382140720).

263231550 is an abundant number, since it is smaller than the sum of its proper divisors (501049890).

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

263231550 is a wasteful number, since it uses less digits than its factorization.

263231550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 939 counting only the distinct ones).

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

The square root of 263231550 is about 16224.4121619244. The cubic root of 263231550 is about 640.8838293403.

It can be divided in two parts, 2632315 and 50, that added together give a triangular number (2632365 = T₂₂₉₄).

The spelling of 263231550 in words is "two hundred sixty-three million, two hundred thirty-one thousand, five hundred fifty".