54133781 has 8 divisors (see below), whose sum is σ = 60178944. Its totient is φ = 48357360.

The previous prime is 54133753. The next prime is 54133787. The reversal of 54133781 is 18733145.

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 54133781 - 2¹⁴ = 54117397 is a prime.

It is a super-2 number, since 2×54133781² = 5860932490711922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54133787) 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, 66761 + ... + 67566.

It is an arithmetic number, because the mean of its divisors is an integer number (7522368).

Almost surely, 2^54133781 is an apocalyptic number.

It is an amenable number.

54133781 is a deficient number, since it is larger than the sum of its proper divisors (6045163).

54133781 is a wasteful number, since it uses less digits than its factorization.

54133781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134371.

The product of its digits is 10080, while the sum is 32.

The square root of 54133781 is about 7357.5662416318. The cubic root of 54133781 is about 378.2881936653.

The spelling of 54133781 in words is "fifty-four million, one hundred thirty-three thousand, seven hundred eighty-one".