55303661 has 32 divisors (see below), whose sum is σ = 70502400. Its totient is φ = 42292800.

The previous prime is 55303649. The next prime is 55303663. The reversal of 55303661 is 16630355.

It is a cyclic number.

It is not a de Polignac number, because 55303661 - 2¹⁸ = 55041517 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 (55303663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308870 + ... + 309048.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^55303661 is an apocalyptic number.

It is an amenable number.

55303661 is a deficient number, since it is larger than the sum of its proper divisors (15198739).

55303661 is a wasteful number, since it uses less digits than its factorization.

55303661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 55303661 is about 7436.6431271105. The cubic root of 55303661 is about 380.9938458142.

The spelling of 55303661 in words is "fifty-five million, three hundred three thousand, six hundred sixty-one".