55251504 has 240 divisors, whose sum is σ = 200542720. Its totient is φ = 14256000.

The previous prime is 55251503. The next prime is 55251509. The reversal of 55251504 is 40515255.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55251503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 365829 + ... + 365979.

Almost surely, 2^55251504 is an apocalyptic number.

55251504 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55251504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100271360).

55251504 is an abundant number, since it is smaller than the sum of its proper divisors (145291216).

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

55251504 is a wasteful number, since it uses less digits than its factorization.

55251504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 174 counting only the distinct ones).

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

The square root of 55251504 is about 7433.1355429590. The cubic root of 55251504 is about 380.8740361073.

Adding to 55251504 its reverse (40515255), we get a palindrome (95766759).

It can be divided in two parts, 55251 and 504, that added together give a palindrome (55755).

The spelling of 55251504 in words is "fifty-five million, two hundred fifty-one thousand, five hundred four".