49133781 has 12 divisors (see below), whose sum is σ = 71661408. Its totient is φ = 32437224.

The previous prime is 49133767. The next prime is 49133797. The reversal of 49133781 is 18733194.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-49133781 is a prime.

It is a super-2 number, since 2×49133781² = 4828256870711922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49133741) 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, 25575 + ... + 27428.

It is an arithmetic number, because the mean of its divisors is an integer number (5971784).

Almost surely, 2^49133781 is an apocalyptic number.

It is an amenable number.

49133781 is a deficient number, since it is larger than the sum of its proper divisors (22527627).

49133781 is a wasteful number, since it uses less digits than its factorization.

49133781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53112 (or 53109 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 49133781 is about 7009.5492722428. The cubic root of 49133781 is about 366.2632925864.

The spelling of 49133781 in words is "forty-nine million, one hundred thirty-three thousand, seven hundred eighty-one".