510049891 has 4 divisors (see below), whose sum is σ = 549284512. Its totient is φ = 470815272.

The previous prime is 510049879. The next prime is 510049919. The reversal of 510049891 is 198940015.

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-510049891 is a prime.

It is a super-2 number, since 2×510049891² = 520301782618223762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 510049891.

It is not an unprimeable number, because it can be changed into a prime (510049291) 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, 19617291 + ... + 19617316.

It is an arithmetic number, because the mean of its divisors is an integer number (137321128).

Almost surely, 2^510049891 is an apocalyptic number.

510049891 is a deficient number, since it is larger than the sum of its proper divisors (39234621).

510049891 is a wasteful number, since it uses less digits than its factorization.

510049891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39234620.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 510049891 is about 22584.2841595655. The cubic root of 510049891 is about 798.9830259818.

The spelling of 510049891 in words is "five hundred ten million, forty-nine thousand, eight hundred ninety-one".