223542939891 has 16 divisors (see below), whose sum is σ = 313783491200. Its totient is φ = 141167458368.

The previous prime is 223542939839. The next prime is 223542939901. The reversal of 223542939891 is 198939245322.

It is a happy number.

It is not a de Polignac number, because 223542939891 - 2¹⁸ = 223542677747 is a prime.

It is a super-2 number, since 2×223542939891² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223542939491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226455 + ... + 705951.

It is an arithmetic number, because the mean of its divisors is an integer number (19611468200).

Almost surely, 2^223542939891 is an apocalyptic number.

223542939891 is a deficient number, since it is larger than the sum of its proper divisors (90240551309).

223542939891 is a wasteful number, since it uses less digits than its factorization.

223542939891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487698.

The product of its digits is 8398080, while the sum is 57.

The spelling of 223542939891 in words is "two hundred twenty-three billion, five hundred forty-two million, nine hundred thirty-nine thousand, eight hundred ninety-one".