212740477 has 8 divisors (see below), whose sum is σ = 216329216. Its totient is φ = 209164032.

The previous prime is 212740459. The next prime is 212740523. The reversal of 212740477 is 774047212.

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 a de Polignac number, because none of the positive numbers 2^k-212740477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212740447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35908 + ... + 41410.

It is an arithmetic number, because the mean of its divisors is an integer number (27041152).

Almost surely, 2^212740477 is an apocalyptic number.

It is an amenable number.

212740477 is a deficient number, since it is larger than the sum of its proper divisors (3588739).

212740477 is an equidigital number, since it uses as much as digits as its factorization.

212740477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6147.

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 212740477 is about 14585.6256979260. The cubic root of 212740477 is about 596.9666132670.

Adding to 212740477 its reverse (774047212), we get a palindrome (986787689).

The spelling of 212740477 in words is "two hundred twelve million, seven hundred forty thousand, four hundred seventy-seven".