213534240554 has 4 divisors (see below), whose sum is σ = 320301360834. Its totient is φ = 106767120276.

The previous prime is 213534240533. The next prime is 213534240587. The reversal of 213534240554 is 455042435312.

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

It can be written as a sum of positive squares in only one way, i.e., 135293759329 + 78240481225 = 367823^2 + 279715^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53383560137 + ... + 53383560140.

Almost surely, 2^213534240554 is an apocalyptic number.

213534240554 is a deficient number, since it is larger than the sum of its proper divisors (106767120280).

213534240554 is a wasteful number, since it uses less digits than its factorization.

213534240554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106767120279.

The product of its (nonzero) digits is 288000, while the sum is 38.

Adding to 213534240554 its reverse (455042435312), we get a palindrome (668576675866).

The spelling of 213534240554 in words is "two hundred thirteen billion, five hundred thirty-four million, two hundred forty thousand, five hundred fifty-four".