263523242 has 4 divisors (see below), whose sum is σ = 395284866. Its totient is φ = 131761620.

The previous prime is 263523229. The next prime is 263523301. The reversal of 263523242 is 242325362.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242325362 = 2 ⋅121162681.

It can be written as a sum of positive squares in only one way, i.e., 176119441 + 87403801 = 13271^2 + 9349^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65880809 + ... + 65880812.

Almost surely, 2^263523242 is an apocalyptic number.

263523242 is a deficient number, since it is larger than the sum of its proper divisors (131761624).

263523242 is a wasteful number, since it uses less digits than its factorization.

263523242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131761623.

The product of its digits is 17280, while the sum is 29.

The square root of 263523242 is about 16233.3989663286. The cubic root of 263523242 is about 641.1204672326.

The spelling of 263523242 in words is "two hundred sixty-three million, five hundred twenty-three thousand, two hundred forty-two".