212303477 has 2 divisors, whose sum is σ = 212303478. Its totient is φ = 212303476.

The previous prime is 212303449. The next prime is 212303479. The reversal of 212303477 is 774303212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113081956 + 99221521 = 10634^2 + 9961^2 .

It is a cyclic number.

It is not a de Polignac number, because 212303477 - 2²² = 208109173 is a prime.

Together with 212303479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212303479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106151738 + 106151739.

It is an arithmetic number, because the mean of its divisors is an integer number (106151739).

Almost surely, 2^212303477 is an apocalyptic number.

It is an amenable number.

212303477 is a deficient number, since it is larger than the sum of its proper divisors (1).

212303477 is an equidigital number, since it uses as much as digits as its factorization.

212303477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 212303477 is about 14570.6374946328. The cubic root of 212303477 is about 596.5575808746.

Adding to 212303477 its reverse (774303212), we get a palindrome (986606689).

The spelling of 212303477 in words is "two hundred twelve million, three hundred three thousand, four hundred seventy-seven".