55987201 has 2 divisors, whose sum is σ = 55987202. Its totient is φ = 55987200.

The previous prime is 55987187. The next prime is 55987207. The reversal of 55987201 is 10278955.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51825601 + 4161600 = 7199^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 55987201 - 2¹⁵ = 55954433 is a prime.

It is not a weakly prime, because it can be changed into another prime (55987207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27993600 + 27993601.

It is an arithmetic number, because the mean of its divisors is an integer number (27993601).

Almost surely, 2^55987201 is an apocalyptic number.

It is an amenable number.

55987201 is a deficient number, since it is larger than the sum of its proper divisors (1).

55987201 is an equidigital number, since it uses as much as digits as its factorization.

55987201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 55987201 is about 7482.4595555205. The cubic root of 55987201 is about 382.5570871834.

The spelling of 55987201 in words is "fifty-five million, nine hundred eighty-seven thousand, two hundred one".