48581781 has 4 divisors (see below), whose sum is σ = 64775712. Its totient is φ = 32387852.

The previous prime is 48581779. The next prime is 48581783. The reversal of 48581781 is 18718584.

48581781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (48581779) and next prime (48581783).

It is a cyclic number.

It is not a de Polignac number, because 48581781 - 2¹ = 48581779 is a prime.

It is a super-2 number, since 2×48581781² = 4720378890263922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48581783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8096961 + ... + 8096966.

It is an arithmetic number, because the mean of its divisors is an integer number (16193928).

Almost surely, 2^48581781 is an apocalyptic number.

It is an amenable number.

48581781 is a deficient number, since it is larger than the sum of its proper divisors (16193931).

48581781 is a wasteful number, since it uses less digits than its factorization.

48581781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16193930.

The product of its digits is 71680, while the sum is 42.

The square root of 48581781 is about 6970.0631991396. The cubic root of 48581781 is about 364.8865125377.

The spelling of 48581781 in words is "forty-eight million, five hundred eighty-one thousand, seven hundred eighty-one".