263140245 has 40 divisors (see below), whose sum is σ = 486942720. Its totient is φ = 135807840.

The previous prime is 263140219. The next prime is 263140247. The reversal of 263140245 is 542041362.

263140245 is a `hidden beast` number, since 2 + 631 + 4 + 0 + 24 + 5 = 666.

It is not a de Polignac number, because 263140245 - 2⁹ = 263139733 is a prime.

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 (263140247) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2076 + ... + 23034.

It is an arithmetic number, because the mean of its divisors is an integer number (12173568).

Almost surely, 2^263140245 is an apocalyptic number.

It is an amenable number.

263140245 is a deficient number, since it is larger than the sum of its proper divisors (223802475).

263140245 is a wasteful number, since it uses less digits than its factorization.

263140245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21007 (or 20998 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 263140245 is about 16221.5981025298. The cubic root of 263140245 is about 640.8097213734.

The spelling of 263140245 in words is "two hundred sixty-three million, one hundred forty thousand, two hundred forty-five".