54321640 has 32 divisors (see below), whose sum is σ = 126441000. Its totient is φ = 20978944.

The previous prime is 54321637. The next prime is 54321643. The reversal of 54321640 is 4612345.

It is an interprime number because it is at equal distance from previous prime (54321637) and next prime (54321643).

It can be written as a sum of positive squares in 4 ways, for example, as 31606884 + 22714756 = 5622^2 + 4766^2 .

It is not an unprimeable number, because it can be changed into a prime (54321643) 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, 22255 + ... + 24574.

Almost surely, 2^54321640 is an apocalyptic number.

It is an amenable number.

54321640 is an abundant number, since it is smaller than the sum of its proper divisors (72119360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54321640 is a wasteful number, since it uses less digits than its factorization.

54321640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46869 (or 46865 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 54321640 is about 7370.3215669332. The cubic root of 54321640 is about 378.7252762274.

Adding to 54321640 its reverse (4612345), we get a palindrome (58933985).

The spelling of 54321640 in words is "fifty-four million, three hundred twenty-one thousand, six hundred forty".