55013533 has 2 divisors, whose sum is σ = 55013534. Its totient is φ = 55013532.

The previous prime is 55013509. The next prime is 55013537. The reversal of 55013533 is 33531055.

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., 45995524 + 9018009 = 6782^2 + 3003^2 .

It is a cyclic number.

It is not a de Polignac number, because 55013533 - 2⁵ = 55013501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55013498 and 55013507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55013537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27506766 + 27506767.

It is an arithmetic number, because the mean of its divisors is an integer number (27506767).

Almost surely, 2^55013533 is an apocalyptic number.

It is an amenable number.

55013533 is a deficient number, since it is larger than the sum of its proper divisors (1).

55013533 is an equidigital number, since it uses as much as digits as its factorization.

55013533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3375, while the sum is 25.

The square root of 55013533 is about 7417.1108256517. The cubic root of 55013533 is about 380.3264346429.

Adding to 55013533 its reverse (33531055), we get a palindrome (88544588).

The spelling of 55013533 in words is "fifty-five million, thirteen thousand, five hundred thirty-three".