213572461 has 2 divisors, whose sum is σ = 213572462. Its totient is φ = 213572460.

The previous prime is 213572441. The next prime is 213572467. The reversal of 213572461 is 164275312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194044900 + 19527561 = 13930^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 213572461 - 2⁹ = 213571949 is a prime.

It is a super-2 number, since 2×213572461² = 91226392195193042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213572467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106786230 + 106786231.

It is an arithmetic number, because the mean of its divisors is an integer number (106786231).

Almost surely, 2^213572461 is an apocalyptic number.

It is an amenable number.

213572461 is a deficient number, since it is larger than the sum of its proper divisors (1).

213572461 is an equidigital number, since it uses as much as digits as its factorization.

213572461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 213572461 is about 14614.1185502240. The cubic root of 213572461 is about 597.7438053138.

The spelling of 213572461 in words is "two hundred thirteen million, five hundred seventy-two thousand, four hundred sixty-one".