5211051221557 has 16 divisors (see below), whose sum is σ = 5492049120000. Its totient is φ = 4937499794304.

The previous prime is 5211051221543. The next prime is 5211051221561. The reversal of 5211051221557 is 7551221501125.

It is a cyclic number.

It is not a de Polignac number, because 5211051221557 - 2¹⁵ = 5211051188789 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 (5211051251557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5763457 + ... + 6606022.

It is an arithmetic number, because the mean of its divisors is an integer number (343253070000).

Almost surely, 2^{5211051221557} is an apocalyptic number.

It is an amenable number.

5211051221557 is a deficient number, since it is larger than the sum of its proper divisors (280997898443).

5211051221557 is a wasteful number, since it uses less digits than its factorization.

5211051221557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12369780.

The product of its (nonzero) digits is 35000, while the sum is 37.

The spelling of 5211051221557 in words is "five trillion, two hundred eleven billion, fifty-one million, two hundred twenty-one thousand, five hundred fifty-seven".