511205990 has 16 divisors (see below), whose sum is σ = 920900448. Its totient is φ = 204320256.

The previous prime is 511205983. The next prime is 511206029. The reversal of 511205990 is 99502115.

It is a super-2 number, since 2×511205990² = 522663128423760200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6587 + ... + 32646.

It is an arithmetic number, because the mean of its divisors is an integer number (57556278).

Almost surely, 2^511205990 is an apocalyptic number.

511205990 is a deficient number, since it is larger than the sum of its proper divisors (409694458).

511205990 is a wasteful number, since it uses less digits than its factorization.

511205990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40543.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 511205990 is about 22609.8648823915. The cubic root of 511205990 is about 799.5862391644.

The spelling of 511205990 in words is "five hundred eleven million, two hundred five thousand, nine hundred ninety".