218402261323 has 4 divisors (see below), whose sum is σ = 218504177728. Its totient is φ = 218300344920.

The previous prime is 218402261317. The next prime is 218402261381. The reversal of 218402261323 is 323162204812.

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 218402261323 - 2⁵ = 218402261291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218402261023) 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, 50954988 + ... + 50959273.

It is an arithmetic number, because the mean of its divisors is an integer number (54626044432).

Almost surely, 2^218402261323 is an apocalyptic number.

218402261323 is a deficient number, since it is larger than the sum of its proper divisors (101916405).

218402261323 is a wasteful number, since it uses less digits than its factorization.

218402261323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101916404.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 218402261323 in words is "two hundred eighteen billion, four hundred two million, two hundred sixty-one thousand, three hundred twenty-three".