55452540 has 192 divisors, whose sum is σ = 191020032. Its totient is φ = 11827200.

The previous prime is 55452533. The next prime is 55452547. The reversal of 55452540 is 4525455.

It is an interprime number because it is at equal distance from previous prime (55452533) and next prime (55452547).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 55452498 and 55452507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55452547) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 197200 + ... + 197480.

It is an arithmetic number, because the mean of its divisors is an integer number (994896).

Almost surely, 2^55452540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55452540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95510016).

55452540 is an abundant number, since it is smaller than the sum of its proper divisors (135567492).

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

55452540 is a wasteful number, since it uses less digits than its factorization.

55452540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 55452540 is about 7446.6462249794. The cubic root of 55452540 is about 381.3354215115.

Adding to 55452540 its reverse (4525455), we get a palindrome (59977995).

It can be divided in two parts, 5 and 5452540, that added together give a palindrome (5452545).

The spelling of 55452540 in words is "fifty-five million, four hundred fifty-two thousand, five hundred forty".