223861000 has 128 divisors (see below), whose sum is σ = 584962560. Its totient is φ = 79488000.

The previous prime is 223860991. The next prime is 223861007. The reversal of 223861000 is 168322.

223861000 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×223861000² = 100227494642000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (223861007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516784 + ... + 517216.

It is an arithmetic number, because the mean of its divisors is an integer number (4570020).

Almost surely, 2^223861000 is an apocalyptic number.

223861000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 223861000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292481280).

223861000 is an abundant number, since it is smaller than the sum of its proper divisors (361101560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223861000 is a wasteful number, since it uses less digits than its factorization.

223861000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 223861000 is about 14961.9851624041. The cubic root of 223861000 is about 607.1921475883.

The spelling of 223861000 in words is "two hundred twenty-three million, eight hundred sixty-one thousand".