212530764457 has 4 divisors (see below), whose sum is σ = 231851743056. Its totient is φ = 193209785860.

The previous prime is 212530764403. The next prime is 212530764463. The reversal of 212530764457 is 754467035212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212530764457 - 2²⁷ = 212396546729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212530764497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9660489283 + ... + 9660489304.

It is an arithmetic number, because the mean of its divisors is an integer number (57962935764).

Almost surely, 2^212530764457 is an apocalyptic number.

It is an amenable number.

212530764457 is a deficient number, since it is larger than the sum of its proper divisors (19320978599).

212530764457 is a wasteful number, since it uses less digits than its factorization.

212530764457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19320978598.

The product of its (nonzero) digits is 1411200, while the sum is 46.

Adding to 212530764457 its reverse (754467035212), we get a palindrome (966997799669).

The spelling of 212530764457 in words is "two hundred twelve billion, five hundred thirty million, seven hundred sixty-four thousand, four hundred fifty-seven".