48981581 has 12 divisors (see below), whose sum is σ = 55304064. Its totient is φ = 42978600.

The previous prime is 48981571. The next prime is 48981617. The reversal of 48981581 is 18518984.

It is not a de Polignac number, because 48981581 - 2¹⁴ = 48965197 is a prime.

It is a super-2 number, since 2×48981581² = 4798390554519122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48981521) 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, 129050 + ... + 129428.

It is an arithmetic number, because the mean of its divisors is an integer number (4608672).

Almost surely, 2^48981581 is an apocalyptic number.

It is an amenable number.

48981581 is a deficient number, since it is larger than the sum of its proper divisors (6322483).

48981581 is an equidigital number, since it uses as much as digits as its factorization.

48981581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800 (or 421 counting only the distinct ones).

The product of its digits is 92160, while the sum is 44.

The square root of 48981581 is about 6998.6842334827. The cubic root of 48981581 is about 365.8847144044.

The spelling of 48981581 in words is "forty-eight million, nine hundred eighty-one thousand, five hundred eighty-one".