212389557 has 16 divisors (see below), whose sum is σ = 288847680. Its totient is φ = 138776832.

The previous prime is 212389537. The next prime is 212389561. The reversal of 212389557 is 755983212.

It is a happy number.

It is not a de Polignac number, because 212389557 - 2⁶ = 212389493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212389537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64413 + ... + 67629.

It is an arithmetic number, because the mean of its divisors is an integer number (18052980).

Almost surely, 2^212389557 is an apocalyptic number.

It is an amenable number.

212389557 is a deficient number, since it is larger than the sum of its proper divisors (76458123).

212389557 is a wasteful number, since it uses less digits than its factorization.

212389557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3652.

The product of its digits is 151200, while the sum is 42.

The square root of 212389557 is about 14573.5910811303. The cubic root of 212389557 is about 596.6381961940.

The spelling of 212389557 in words is "two hundred twelve million, three hundred eighty-nine thousand, five hundred fifty-seven".