212251457 has 8 divisors (see below), whose sum is σ = 231940800. Its totient is φ = 192627760.

The previous prime is 212251453. The next prime is 212251463. The reversal of 212251457 is 754152212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212251457 - 2² = 212251453 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212251453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9518 + ... + 22695.

It is an arithmetic number, because the mean of its divisors is an integer number (28992600).

Almost surely, 2^212251457 is an apocalyptic number.

It is an amenable number.

212251457 is a deficient number, since it is larger than the sum of its proper divisors (19689343).

212251457 is a wasteful number, since it uses less digits than its factorization.

212251457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32823.

The product of its digits is 5600, while the sum is 29.

The square root of 212251457 is about 14568.8522883582. The cubic root of 212251457 is about 596.5088527351.

The spelling of 212251457 in words is "two hundred twelve million, two hundred fifty-one thousand, four hundred fifty-seven".