213420061 has 4 divisors (see below), whose sum is σ = 213482592. Its totient is φ = 213357532.

The previous prime is 213420043. The next prime is 213420073. The reversal of 213420061 is 160024312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213420061 - 2¹⁹ = 212895773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213420041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25831 + ... + 33076.

It is an arithmetic number, because the mean of its divisors is an integer number (53370648).

Almost surely, 2^213420061 is an apocalyptic number.

It is an amenable number.

213420061 is a deficient number, since it is larger than the sum of its proper divisors (62531).

213420061 is an equidigital number, since it uses as much as digits as its factorization.

213420061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62530.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 213420061 is about 14608.9034838348. The cubic root of 213420061 is about 597.6015931078.

Adding to 213420061 its reverse (160024312), we get a palindrome (373444373).

The spelling of 213420061 in words is "two hundred thirteen million, four hundred twenty thousand, sixty-one".