49983581 has 4 divisors (see below), whose sum is σ = 49998972. Its totient is φ = 49968192.

The previous prime is 49983569. The next prime is 49983589. The reversal of 49983581 is 18538994.

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 4972900 + 45010681 = 2230^2 + 6709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-49983581 is a prime.

It is a super-2 number, since 2×49983581² = 4996716739167122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49983589) 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, 710 + ... + 10023.

It is an arithmetic number, because the mean of its divisors is an integer number (12499743).

Almost surely, 2^49983581 is an apocalyptic number.

It is an amenable number.

49983581 is a deficient number, since it is larger than the sum of its proper divisors (15391).

49983581 is a wasteful number, since it uses less digits than its factorization.

49983581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15390.

The product of its digits is 311040, while the sum is 47.

The square root of 49983581 is about 7069.9067179136. The cubic root of 49983581 is about 368.3628200404.

The spelling of 49983581 in words is "forty-nine million, nine hundred eighty-three thousand, five hundred eighty-one".