55152540 has 72 divisors (see below), whose sum is σ = 170072448. Its totient is φ = 14463360.

The previous prime is 55152529. The next prime is 55152547. The reversal of 55152540 is 4525155.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55152547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8469 + ... + 13491.

Almost surely, 2^55152540 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 55152540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85036224).

55152540 is an abundant number, since it is smaller than the sum of its proper divisors (114919908).

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

55152540 is a wasteful number, since it uses less digits than its factorization.

55152540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5099 (or 5094 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 55152540 is about 7426.4756109476. The cubic root of 55152540 is about 380.6464987412.

Adding to 55152540 its reverse (4525155), we get a palindrome (59677695).

The spelling of 55152540 in words is "fifty-five million, one hundred fifty-two thousand, five hundred forty".