5211042309 has 128 divisors (see below), whose sum is σ = 9057484800. Its totient is φ = 2931552000.

The previous prime is 5211042289. The next prime is 5211042323. The reversal of 5211042309 is 9032401125.

5211042309 is a `hidden beast` number, since 521 + 104 + 2 + 30 + 9 = 666.

It is not a de Polignac number, because 5211042309 - 2¹⁶ = 5210976773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5211042359) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 28790199 + ... + 28790379.

It is an arithmetic number, because the mean of its divisors is an integer number (70761600).

Almost surely, 2^5211042309 is an apocalyptic number.

5211042309 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

5211042309 is a deficient number, since it is larger than the sum of its proper divisors (3846442491).

5211042309 is a wasteful number, since it uses less digits than its factorization.

5211042309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 5211042309 is about 72187.5495428401. The cubic root of 5211042309 is about 1733.7036615991.

The spelling of 5211042309 in words is "five billion, two hundred eleven million, forty-two thousand, three hundred nine".