50511001 has 4 divisors (see below), whose sum is σ = 50672692. Its totient is φ = 50349312.

The previous prime is 50510981. The next prime is 50511007. The reversal of 50511001 is 10011505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24255625 + 26255376 = 4925^2 + 5124^2 .

It is a cyclic number.

It is not a de Polignac number, because 50511001 - 2⁵ = 50510969 is a prime.

It is a super-2 number, since 2×50511001² = 5102722444044002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50511007) 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, 80376 + ... + 81001.

It is an arithmetic number, because the mean of its divisors is an integer number (12668173).

Almost surely, 2^50511001 is an apocalyptic number.

It is an amenable number.

50511001 is a deficient number, since it is larger than the sum of its proper divisors (161691).

50511001 is a wasteful number, since it uses less digits than its factorization.

50511001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161690.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 50511001 is about 7107.1091872856. The cubic root of 50511001 is about 369.6539276872.

Adding to 50511001 its reverse (10011505), we get a palindrome (60522506).

The spelling of 50511001 in words is "fifty million, five hundred eleven thousand, one".