55100725 has 12 divisors (see below), whose sum is σ = 70681860. Its totient is φ = 42560000.

The previous prime is 55100719. The next prime is 55100729. The reversal of 55100725 is 52700155.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14641 + 55086084 = 121^2 + 7422^2 .

It is a de Polignac number, because none of the positive numbers 2^k-55100725 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 55100725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37276 + ... + 38725.

It is an arithmetic number, because the mean of its divisors is an integer number (5890155).

Almost surely, 2^55100725 is an apocalyptic number.

It is an amenable number.

55100725 is a deficient number, since it is larger than the sum of its proper divisors (15581135).

55100725 is a wasteful number, since it uses less digits than its factorization.

55100725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76040 (or 76035 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 55100725 is about 7422.9862589122. The cubic root of 55100725 is about 380.5272574629.

The spelling of 55100725 in words is "fifty-five million, one hundred thousand, seven hundred twenty-five".