223207071661 has 8 divisors (see below), whose sum is σ = 255373818624. Its totient is φ = 191110330320.

The previous prime is 223207071629. The next prime is 223207071667. The reversal of 223207071661 is 166170702322.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223207071661 - 2⁵ = 223207071629 is a prime.

It is a super-3 number, since 3×223207071661³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 223207071661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223207071667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17494570 + ... + 17507323.

It is an arithmetic number, because the mean of its divisors is an integer number (31921727328).

Almost surely, 2^223207071661 is an apocalyptic number.

It is an amenable number.

223207071661 is a deficient number, since it is larger than the sum of its proper divisors (32166746963).

223207071661 is an equidigital number, since it uses as much as digits as its factorization.

223207071661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35002811.

The product of its (nonzero) digits is 42336, while the sum is 37.

Adding to 223207071661 its reverse (166170702322), we get a palindrome (389377773983).

It can be divided in two parts, 2232070 and 71661, that added together give a triangular number (2303731 = T₂₁₄₆).

The spelling of 223207071661 in words is "two hundred twenty-three billion, two hundred seven million, seventy-one thousand, six hundred sixty-one".