55100551 has 16 divisors (see below), whose sum is σ = 65462400. Its totient is φ = 45813600.

The previous prime is 55100537. The next prime is 55100557. The reversal of 55100551 is 15500155.

It is a cyclic number.

It is not a de Polignac number, because 55100551 - 2⁹ = 55100039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1516 + ... + 10606.

It is an arithmetic number, because the mean of its divisors is an integer number (4091400).

Almost surely, 2^55100551 is an apocalyptic number.

55100551 is the 6061-st pentagonal number.

55100551 is a deficient number, since it is larger than the sum of its proper divisors (10361849).

55100551 is a wasteful number, since it uses less digits than its factorization.

55100551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9150.

The product of its (nonzero) digits is 625, while the sum is 22.

The square root of 55100551 is about 7422.9745385526. The cubic root of 55100551 is about 380.5268569127.

It can be divided in two parts, 55100 and 551, that multiplied together give a square (30360100 = 5510²).

The spelling of 55100551 in words is "fifty-five million, one hundred thousand, five hundred fifty-one".