212580045 has 28 divisors (see below), whose sum is σ = 382475676. Its totient is φ = 113374080.

The previous prime is 212580029. The next prime is 212580083. The reversal of 212580045 is 540085212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28869129 + 183710916 = 5373^2 + 13554^2 .

It is not a de Polignac number, because 212580045 - 2⁴ = 212580029 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25516 + ... + 32805.

Almost surely, 2^212580045 is an apocalyptic number.

It is an amenable number.

212580045 is a deficient number, since it is larger than the sum of its proper divisors (169895631).

212580045 is an frugal number, since it uses more digits than its factorization.

212580045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58344 (or 58329 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 212580045 is about 14580.1249994642. The cubic root of 212580045 is about 596.8165139005.

The spelling of 212580045 in words is "two hundred twelve million, five hundred eighty thousand, forty-five".