263431242 has 72 divisors (see below), whose sum is σ = 599648868. Its totient is φ = 83566080.

The previous prime is 263431237. The next prime is 263431243. The reversal of 263431242 is 242134362.

263431242 is a `hidden beast` number, since 2 + 634 + 3 + 1 + 24 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 258855921 + 4575321 = 16089^2 + 2139^2 .

It is not an unprimeable number, because it can be changed into a prime (263431243) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1677828 + ... + 1677984.

Almost surely, 2^263431242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263431242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299824434).

263431242 is an abundant number, since it is smaller than the sum of its proper divisors (336217626).

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

263431242 is a wasteful number, since it uses less digits than its factorization.

263431242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 290 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 263431242 is about 16230.5650548587. The cubic root of 263431242 is about 641.0458502237.

The spelling of 263431242 in words is "two hundred sixty-three million, four hundred thirty-one thousand, two hundred forty-two".