49231581 has 8 divisors (see below), whose sum is σ = 75019584. Its totient is φ = 28132320.

The previous prime is 49231579. The next prime is 49231619. The reversal of 49231581 is 18513294.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49231581 - 2¹ = 49231579 is a prime.

It is a super-2 number, since 2×49231581² = 4847497135519122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49231081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1172160 + ... + 1172201.

It is an arithmetic number, because the mean of its divisors is an integer number (9377448).

Almost surely, 2^49231581 is an apocalyptic number.

It is an amenable number.

49231581 is a deficient number, since it is larger than the sum of its proper divisors (25788003).

49231581 is a wasteful number, since it uses less digits than its factorization.

49231581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2344371.

The product of its digits is 8640, while the sum is 33.

The square root of 49231581 is about 7016.5220016758. The cubic root of 49231581 is about 366.5061452551.

The spelling of 49231581 in words is "forty-nine million, two hundred thirty-one thousand, five hundred eighty-one".