55035621 has 6 divisors (see below), whose sum is σ = 79495910. Its totient is φ = 36690408.

The previous prime is 55035611. The next prime is 55035623. The reversal of 55035621 is 12653055.

55035621 is a `hidden beast` number, since 5 + 5 + 0 + 35 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38266596 + 16769025 = 6186^2 + 4095^2 .

It is not a de Polignac number, because 55035621 - 2²¹ = 52938469 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 (55035623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3057526 + ... + 3057543.

Almost surely, 2^55035621 is an apocalyptic number.

It is an amenable number.

55035621 is a deficient number, since it is larger than the sum of its proper divisors (24460289).

55035621 is a wasteful number, since it uses less digits than its factorization.

55035621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115075 (or 6115072 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55035621 is about 7418.5996657051. The cubic root of 55035621 is about 380.3773283400.

Adding to 55035621 its reverse (12653055), we get a palindrome (67688676).

The spelling of 55035621 in words is "fifty-five million, thirty-five thousand, six hundred twenty-one".