55402500 has 120 divisors (see below), whose sum is σ = 165322080. Its totient is φ = 14432000.

The previous prime is 55402483. The next prime is 55402511. The reversal of 55402500 is 520455.

55402500 = T₁₀₇₁ + T₁₀₇₂ + ... + T₁₁₅₉.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 622456 + ... + 622544.

It is an arithmetic number, because the mean of its divisors is an integer number (1377684).

Almost surely, 2^55402500 is an apocalyptic number.

55402500 is a gapful number since it is divisible by the number (50) 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 55402500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82661040).

55402500 is an abundant number, since it is smaller than the sum of its proper divisors (109919580).

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

55402500 is a wasteful number, since it uses less digits than its factorization.

55402500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55402500 is about 7443.2855648564. The cubic root of 55402500 is about 381.2206821494.

Adding to 55402500 its reverse (520455), we get a palindrome (55922955).

The spelling of 55402500 in words is "fifty-five million, four hundred two thousand, five hundred".