219491313001 has 3 divisors (see below), whose sum is σ = 219491781501. Its totient is φ = 219490844502.

The previous prime is 219491312987. The next prime is 219491313059. The reversal of 219491313001 is 100313194912.

The square root of 219491313001 is 468499.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 219491313001 - 2⁵ = 219491312969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219491310001) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 234250 + ... + 702748.

It is an arithmetic number, because the mean of its divisors is an integer number (73163927167).

Almost surely, 2^219491313001 is an apocalyptic number.

219491313001 is the 468499-th square number.

219491313001 is the 234250-th centered octagonal number.

It is an amenable number.

219491313001 is a deficient number, since it is larger than the sum of its proper divisors (468500).

219491313001 is an frugal number, since it uses more digits than its factorization.

219491313001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936998 (or 468499 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The spelling of 219491313001 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred thirteen thousand, one".