213894125546 has 4 divisors (see below), whose sum is σ = 320841188322. Its totient is φ = 106947062772.

The previous prime is 213894125503. The next prime is 213894125569. The reversal of 213894125546 is 645521498312.

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., 175246890625 + 38647234921 = 418625^2 + 196589^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213894125494 and 213894125503.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53473531385 + ... + 53473531388.

Almost surely, 2^213894125546 is an apocalyptic number.

213894125546 is a deficient number, since it is larger than the sum of its proper divisors (106947062776).

213894125546 is a wasteful number, since it uses less digits than its factorization.

213894125546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106947062775.

The product of its digits is 2073600, while the sum is 50.

The spelling of 213894125546 in words is "two hundred thirteen billion, eight hundred ninety-four million, one hundred twenty-five thousand, five hundred forty-six".