5121556214431 has 4 divisors (see below), whose sum is σ = 5121563250232. Its totient is φ = 5121549178632.

The previous prime is 5121556214321. The next prime is 5121556214507. The reversal of 5121556214431 is 1344126551215.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5121556214431 is a prime.

It is a super-2 number, since 2×5121556214431² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121556218431) 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, 2281056 + ... + 3930181.

It is an arithmetic number, because the mean of its divisors is an integer number (1280390812558).

Almost surely, 2^{5121556214431} is an apocalyptic number.

5121556214431 is a deficient number, since it is larger than the sum of its proper divisors (7035801).

5121556214431 is an equidigital number, since it uses as much as digits as its factorization.

5121556214431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035800.

The product of its digits is 144000, while the sum is 40.

The spelling of 5121556214431 in words is "five trillion, one hundred twenty-one billion, five hundred fifty-six million, two hundred fourteen thousand, four hundred thirty-one".