5211550665 has 32 divisors (see below), whose sum is σ = 9391914240. Its totient is φ = 2741413248.

The previous prime is 5211550639. The next prime is 5211550697. The reversal of 5211550665 is 5660551125.

It is not a de Polignac number, because 5211550665 - 2⁶ = 5211550601 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254557 + ... + 274266.

It is an arithmetic number, because the mean of its divisors is an integer number (293497320).

Almost surely, 2^5211550665 is an apocalyptic number.

It is an amenable number.

5211550665 is a deficient number, since it is larger than the sum of its proper divisors (4180363575).

5211550665 is a wasteful number, since it uses less digits than its factorization.

5211550665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528910 (or 528904 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The square root of 5211550665 is about 72191.0705350738. The cubic root of 5211550665 is about 1733.7600361174.

The spelling of 5211550665 in words is "five billion, two hundred eleven million, five hundred fifty thousand, six hundred sixty-five".