55515001 has 2 divisors, whose sum is σ = 55515002. Its totient is φ = 55515000.

The previous prime is 55514993. The next prime is 55515011. The reversal of 55515001 is 10051555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51494976 + 4020025 = 7176^2 + 2005^2 .

It is a cyclic number.

It is not a de Polignac number, because 55515001 - 2³ = 55514993 is a prime.

It is not a weakly prime, because it can be changed into another prime (55515011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27757500 + 27757501.

It is an arithmetic number, because the mean of its divisors is an integer number (27757501).

Almost surely, 2^55515001 is an apocalyptic number.

It is an amenable number.

55515001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55515001 is an equidigital number, since it uses as much as digits as its factorization.

55515001 is an evil number, because the sum of its binary digits is even.

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

The square root of 55515001 is about 7450.8389460516. The cubic root of 55515001 is about 381.4785448284.

Adding to 55515001 its reverse (10051555), we get a palindrome (65566556).

The spelling of 55515001 in words is "fifty-five million, five hundred fifteen thousand, one".