5211271905 has 32 divisors (see below), whose sum is σ = 9708989184. Its totient is φ = 2337344256.

The previous prime is 5211271883. The next prime is 5211271909. The reversal of 5211271905 is 5091721125.

It is not a de Polignac number, because 5211271905 - 2²⁴ = 5194494689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5211271909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 462654 + ... + 473783.

It is an arithmetic number, because the mean of its divisors is an integer number (303405912).

Almost surely, 2^5211271905 is an apocalyptic number.

It is an amenable number.

5211271905 is a deficient number, since it is larger than the sum of its proper divisors (4497717279).

5211271905 is a wasteful number, since it uses less digits than its factorization.

5211271905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936505.

The product of its (nonzero) digits is 6300, while the sum is 33.

The square root of 5211271905 is about 72189.1397995571. The cubic root of 5211271905 is about 1733.7291232730.

The spelling of 5211271905 in words is "five billion, two hundred eleven million, two hundred seventy-one thousand, nine hundred five".