223612731 has 14 divisors (see below), whose sum is σ = 335266820. Its totient is φ = 149074668.

The previous prime is 223612721. The next prime is 223612759. The reversal of 223612731 is 137216322.

It is not a de Polignac number, because 223612731 - 2¹¹ = 223610683 is a prime.

It is a super-2 number, since 2×223612731² = 100005306930556722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223612695 and 223612704.

It is not an unprimeable number, because it can be changed into a prime (223612721) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 152641 + ... + 154098.

It is an arithmetic number, because the mean of its divisors is an integer number (23947630).

Almost surely, 2^223612731 is an apocalyptic number.

223612731 is a deficient number, since it is larger than the sum of its proper divisors (111654089).

223612731 is an frugal number, since it uses more digits than its factorization.

223612731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306757 (or 306742 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 223612731 is about 14953.6862010676. The cubic root of 223612731 is about 606.9675993949.

The spelling of 223612731 in words is "two hundred twenty-three million, six hundred twelve thousand, seven hundred thirty-one".