55513001 has 2 divisors, whose sum is σ = 55513002. Its totient is φ = 55513000.

The previous prime is 55512979. The next prime is 55513009. The reversal of 55513001 is 10031555.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 678976 = 7405^2 + 824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55513001 is a prime.

It is not a weakly prime, because it can be changed into another prime (55513009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27756500 + 27756501.

It is an arithmetic number, because the mean of its divisors is an integer number (27756501).

Almost surely, 2^55513001 is an apocalyptic number.

It is an amenable number.

55513001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55513001 is an equidigital number, since it uses as much as digits as its factorization.

55513001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 55513001 is about 7450.7047317687. The cubic root of 55513001 is about 381.4739636868.

Adding to 55513001 its reverse (10031555), we get a palindrome (65544556).

The spelling of 55513001 in words is "fifty-five million, five hundred thirteen thousand, one".