212450521 has 4 divisors (see below), whose sum is σ = 212741092. Its totient is φ = 212159952.

The previous prime is 212450489. The next prime is 212450527. The reversal of 212450521 is 125054212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134304921 + 78145600 = 11589^2 + 8840^2 .

It is a cyclic number.

It is not a de Polignac number, because 212450521 - 2⁵ = 212450489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212450492 and 212450501.

It is not an unprimeable number, because it can be changed into a prime (212450527) 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, 144186 + ... + 145651.

It is an arithmetic number, because the mean of its divisors is an integer number (53185273).

Almost surely, 2^212450521 is an apocalyptic number.

It is an amenable number.

212450521 is a deficient number, since it is larger than the sum of its proper divisors (290571).

212450521 is an equidigital number, since it uses as much as digits as its factorization.

212450521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290570.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212450521 is about 14575.6825226128. The cubic root of 212450521 is about 596.6952767960.

It can be divided in two parts, 21 and 2450521, that added together give a palindrome (2450542).

The spelling of 212450521 in words is "two hundred twelve million, four hundred fifty thousand, five hundred twenty-one".