770231400221 has 4 divisors (see below), whose sum is σ = 770422956444. Its totient is φ = 770039844000.

The previous prime is 770231400217. The next prime is 770231400223. The reversal of 770231400221 is 122004132077.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33466677721 + 736764722500 = 182939^2 + 858350^2 .

It is a cyclic number.

It is not a de Polignac number, because 770231400221 - 2² = 770231400217 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 (770231400223) 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, 95772080 + ... + 95780121.

It is an arithmetic number, because the mean of its divisors is an integer number (192605739111).

Almost surely, 2^770231400221 is an apocalyptic number.

It is an amenable number.

770231400221 is a deficient number, since it is larger than the sum of its proper divisors (191556223).

770231400221 is a wasteful number, since it uses less digits than its factorization.

770231400221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191556222.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 770231400221 its reverse (122004132077), we get a palindrome (892235532298).

The spelling of 770231400221 in words is "seven hundred seventy billion, two hundred thirty-one million, four hundred thousand, two hundred twenty-one".