213622641 has 24 divisors (see below), whose sum is σ = 312397800. Its totient is φ = 140659200.

The previous prime is 213622631. The next prime is 213622679. The reversal of 213622641 is 146226312.

213622641 is a `hidden beast` number, since 2 + 13 + 6 + 2 + 2 + 641 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 42771600 + 170851041 = 6540^2 + 13071^2 .

It is not a de Polignac number, because 213622641 - 2¹⁷ = 213491569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213622631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322851 + ... + 323511.

It is an arithmetic number, because the mean of its divisors is an integer number (13016575).

Almost surely, 2^213622641 is an apocalyptic number.

It is an amenable number.

213622641 is a deficient number, since it is larger than the sum of its proper divisors (98775159).

213622641 is a wasteful number, since it uses less digits than its factorization.

213622641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057 (or 1054 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 213622641 is about 14615.8352823231. The cubic root of 213622641 is about 597.7906160234.

Adding to 213622641 its reverse (146226312), we get a palindrome (359848953).

The spelling of 213622641 in words is "two hundred thirteen million, six hundred twenty-two thousand, six hundred forty-one".