5221370857 has 4 divisors (see below), whose sum is σ = 5221691776. Its totient is φ = 5221049940.

The previous prime is 5221370851. The next prime is 5221370873. The reversal of 5221370857 is 7580731225.

It is a happy number.

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 5221370857 - 2¹¹ = 5221368809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5221370851) 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, 134673 + ... + 169054.

It is an arithmetic number, because the mean of its divisors is an integer number (1305422944).

Almost surely, 2^5221370857 is an apocalyptic number.

It is an amenable number.

5221370857 is a deficient number, since it is larger than the sum of its proper divisors (320919).

5221370857 is a wasteful number, since it uses less digits than its factorization.

5221370857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320918.

The product of its (nonzero) digits is 117600, while the sum is 40.

The square root of 5221370857 is about 72259.0538064262. The cubic root of 5221370857 is about 1734.8483349558.

The spelling of 5221370857 in words is "five billion, two hundred twenty-one million, three hundred seventy thousand, eight hundred fifty-seven".