213081022450 has 48 divisors (see below), whose sum is σ = 404088741576. Its totient is φ = 83566246400.

The previous prime is 213081022381. The next prime is 213081022457. The reversal of 213081022450 is 54220180312.

It is a Cunningham number, because it is equal to 461607²+1.

It can be written as a sum of positive squares in 12 ways, for example, as 91217892529 + 121863129921 = 302023^2 + 349089^2 .

It is not an unprimeable number, because it can be changed into a prime (213081022457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3897504 + ... + 3951796.

Almost surely, 2^213081022450 is an apocalyptic number.

213081022450 is a deficient number, since it is larger than the sum of its proper divisors (191007719126).

213081022450 is a wasteful number, since it uses less digits than its factorization.

213081022450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55839 (or 55834 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 213081022450 in words is "two hundred thirteen billion, eighty-one million, twenty-two thousand, four hundred fifty".