48511809 has 12 divisors (see below), whose sum is σ = 72489300. Its totient is φ = 31225824.

The previous prime is 48511781. The next prime is 48511811. The reversal of 48511809 is 90811584.

It can be written as a sum of positive squares in 2 ways, for example, as 21762225 + 26749584 = 4665^2 + 5172^2 .

It is not a de Polignac number, because 48511809 - 2⁹ = 48511297 is a prime.

It is a super-2 number, since 2×48511809² = 4706791224904962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (48511889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92674 + ... + 93195.

It is an arithmetic number, because the mean of its divisors is an integer number (6040775).

Almost surely, 2^48511809 is an apocalyptic number.

It is an amenable number.

48511809 is a deficient number, since it is larger than the sum of its proper divisors (23977491).

48511809 is a wasteful number, since it uses less digits than its factorization.

48511809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185904 (or 185901 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 48511809 is about 6965.0419237791. The cubic root of 48511809 is about 364.7112472008.

The spelling of 48511809 in words is "forty-eight million, five hundred eleven thousand, eight hundred nine".