213478820551 has 8 divisors (see below), whose sum is σ = 218898738800. Its totient is φ = 208124598528.

The previous prime is 213478820539. The next prime is 213478820587. The reversal of 213478820551 is 155028874312.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 213478820551 - 2²⁹ = 212941949639 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 (213478020551) 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, 16417476 + ... + 16430473.

It is an arithmetic number, because the mean of its divisors is an integer number (27362342350).

Almost surely, 2^213478820551 is an apocalyptic number.

213478820551 is a deficient number, since it is larger than the sum of its proper divisors (5419918249).

213478820551 is an equidigital number, since it uses as much as digits as its factorization.

213478820551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32848113.

The product of its (nonzero) digits is 537600, while the sum is 46.

The spelling of 213478820551 in words is "two hundred thirteen billion, four hundred seventy-eight million, eight hundred twenty thousand, five hundred fifty-one".