213627745 has 4 divisors (see below), whose sum is σ = 256353300. Its totient is φ = 170902192.

The previous prime is 213627709. The next prime is 213627761. The reversal of 213627745 is 547726312.

It is a happy number.

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 76667536 + 136960209 = 8756^2 + 11703^2 .

It is a cyclic number.

It is not a de Polignac number, because 213627745 - 2¹¹ = 213625697 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21362770 + ... + 21362779.

It is an arithmetic number, because the mean of its divisors is an integer number (64088325).

Almost surely, 2^213627745 is an apocalyptic number.

It is an amenable number.

213627745 is a deficient number, since it is larger than the sum of its proper divisors (42725555).

213627745 is an equidigital number, since it uses as much as digits as its factorization.

213627745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42725554.

The product of its digits is 70560, while the sum is 37.

The square root of 213627745 is about 14616.0098864225. The cubic root of 213627745 is about 597.7953769092.

The spelling of 213627745 in words is "two hundred thirteen million, six hundred twenty-seven thousand, seven hundred forty-five".