214728438545 has 8 divisors (see below), whose sum is σ = 258553561896. Its totient is φ = 171196460416.

The previous prime is 214728438527. The next prime is 214728438553. The reversal of 214728438545 is 545834827412.

It is a happy number.

It is a Cunningham number, because it is equal to 463388²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 77301793024 + 137426645521 = 278032^2 + 370711^2 .

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 214728438545 - 2⁸ = 214728438289 is a prime.

It is a super-2 number, since 2×214728438545² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73284692 + ... + 73287621.

It is an arithmetic number, because the mean of its divisors is an integer number (32319195237).

Almost surely, 2^214728438545 is an apocalyptic number.

It is an amenable number.

214728438545 is a deficient number, since it is larger than the sum of its proper divisors (43825123351).

214728438545 is a wasteful number, since it uses less digits than its factorization.

214728438545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146572611.

The product of its digits is 8601600, while the sum is 53.

The spelling of 214728438545 in words is "two hundred fourteen billion, seven hundred twenty-eight million, four hundred thirty-eight thousand, five hundred forty-five".