263213545 has 24 divisors (see below), whose sum is σ = 372483144. Its totient is φ = 178004736.

The previous prime is 263213539. The next prime is 263213549. The reversal of 263213545 is 545312362.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14930496 + 248283049 = 3864^2 + 15757^2 .

It is not a de Polignac number, because 263213545 - 2¹¹ = 263211497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263213549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10527 + ... + 25243.

It is an arithmetic number, because the mean of its divisors is an integer number (15520131).

Almost surely, 2^263213545 is an apocalyptic number.

It is an amenable number.

263213545 is a deficient number, since it is larger than the sum of its proper divisors (109269599).

263213545 is a wasteful number, since it uses less digits than its factorization.

263213545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14809 (or 14802 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The square root of 263213545 is about 16223.8572787115. The cubic root of 263213545 is about 640.8692168867.

The spelling of 263213545 in words is "two hundred sixty-three million, two hundred thirteen thousand, five hundred forty-five".