48911781 has 8 divisors (see below), whose sum is σ = 65387520. Its totient is φ = 32521952.

The previous prime is 48911773. The next prime is 48911801. The reversal of 48911781 is 18711984.

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

It is a cyclic number.

It is not a de Polignac number, because 48911781 - 2³ = 48911773 is a prime.

It is a super-2 number, since 2×48911781² = 4784724641183922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (48911701) 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, 20136 + ... + 22433.

It is an arithmetic number, because the mean of its divisors is an integer number (8173440).

Almost surely, 2^48911781 is an apocalyptic number.

It is an amenable number.

48911781 is a deficient number, since it is larger than the sum of its proper divisors (16475739).

48911781 is a wasteful number, since it uses less digits than its factorization.

48911781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42955.

The product of its digits is 16128, while the sum is 39.

The square root of 48911781 is about 6993.6958040796. The cubic root of 48911781 is about 365.7108334388.

The spelling of 48911781 in words is "forty-eight million, nine hundred eleven thousand, seven hundred eighty-one".