212504407 has 2 divisors, whose sum is σ = 212504408. Its totient is φ = 212504406.

The previous prime is 212504393. The next prime is 212504423. The reversal of 212504407 is 704405212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212504407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212504447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106252203 + 106252204.

It is an arithmetic number, because the mean of its divisors is an integer number (106252204).

Almost surely, 2^212504407 is an apocalyptic number.

212504407 is a deficient number, since it is larger than the sum of its proper divisors (1).

212504407 is an equidigital number, since it uses as much as digits as its factorization.

212504407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 212504407 is about 14577.5308951825. The cubic root of 212504407 is about 596.7457211747.

Adding to 212504407 its reverse (704405212), we get a palindrome (916909619).

The spelling of 212504407 in words is "two hundred twelve million, five hundred four thousand, four hundred seven".