1243215454223 has 4 divisors (see below), whose sum is σ = 1243319007120. Its totient is φ = 1243111901328.

The previous prime is 1243215454219. The next prime is 1243215454231. The reversal of 1243215454223 is 3224545123421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243215454223 - 2² = 1243215454219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243215454253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51758438 + ... + 51782451.

It is an arithmetic number, because the mean of its divisors is an integer number (310829751780).

Almost surely, 2^{1243215454223} is an apocalyptic number.

1243215454223 is a deficient number, since it is larger than the sum of its proper divisors (103552897).

1243215454223 is a wasteful number, since it uses less digits than its factorization.

1243215454223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103552896.

The product of its digits is 230400, while the sum is 38.

The spelling of 1243215454223 in words is "one trillion, two hundred forty-three billion, two hundred fifteen million, four hundred fifty-four thousand, two hundred twenty-three".