213221311425 has 36 divisors (see below), whose sum is σ = 384335627260. Its totient is φ = 112993695360.

The previous prime is 213221311361. The next prime is 213221311441. The reversal of 213221311425 is 524113122312.

It is a happy number.

213221311425 is a `hidden beast` number, since 2 + 1 + 3 + 221 + 3 + 11 + 425 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1031180544 + 212190130881 = 32112^2 + 460641^2 .

It is not a de Polignac number, because 213221311425 - 2⁶ = 213221311361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2982670 + ... + 3053319.

Almost surely, 2^213221311425 is an apocalyptic number.

213221311425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

213221311425 is a deficient number, since it is larger than the sum of its proper divisors (171114315835).

213221311425 is a wasteful number, since it uses less digits than its factorization.

213221311425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6036162 (or 6036154 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

Adding to 213221311425 its reverse (524113122312), we get a palindrome (737334433737).

The spelling of 213221311425 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred eleven thousand, four hundred twenty-five".