54640133 has 4 divisors (see below), whose sum is σ = 55123788. Its totient is φ = 54156480.

The previous prime is 54640127. The next prime is 54640139. The reversal of 54640133 is 33104645.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (54640127) and next prime (54640139).

It can be written as a sum of positive squares in 2 ways, for example, as 19201924 + 35438209 = 4382^2 + 5953^2 .

It is a cyclic number.

It is not a de Polignac number, because 54640133 - 2¹² = 54636037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54640139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241658 + ... + 241883.

It is an arithmetic number, because the mean of its divisors is an integer number (13780947).

Almost surely, 2^54640133 is an apocalyptic number.

It is an amenable number.

54640133 is a deficient number, since it is larger than the sum of its proper divisors (483655).

54640133 is a wasteful number, since it uses less digits than its factorization.

54640133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483654.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 54640133 is about 7391.8964413742. The cubic root of 54640133 is about 379.4640019366.

Adding to 54640133 its reverse (33104645), we get a palindrome (87744778).

The spelling of 54640133 in words is "fifty-four million, six hundred forty thousand, one hundred thirty-three".