223513749 has 20 divisors (see below), whose sum is σ = 334296864. Its totient is φ = 148828104.

The previous prime is 223513733. The next prime is 223513753. The reversal of 223513749 is 947315322.

It is not a de Polignac number, because 223513749 - 2⁴ = 223513733 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223513709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 116254 + ... + 118160.

Almost surely, 2^223513749 is an apocalyptic number.

It is an amenable number.

223513749 is a deficient number, since it is larger than the sum of its proper divisors (110783115).

223513749 is a wasteful number, since it uses less digits than its factorization.

223513749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3366 (or 3357 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 223513749 is about 14950.3762160021. The cubic root of 223513749 is about 606.8780282668.

The spelling of 223513749 in words is "two hundred twenty-three million, five hundred thirteen thousand, seven hundred forty-nine".