53015551 has 2 divisors, whose sum is σ = 53015552. Its totient is φ = 53015550.

The previous prime is 53015539. The next prime is 53015563. The reversal of 53015551 is 15551035.

It is a balanced prime because it is at equal distance from previous prime (53015539) and next prime (53015563).

It is a cyclic number.

It is not a de Polignac number, because 53015551 - 2⁵ = 53015519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53015531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26507775 + 26507776.

It is an arithmetic number, because the mean of its divisors is an integer number (26507776).

Almost surely, 2^53015551 is an apocalyptic number.

53015551 is a deficient number, since it is larger than the sum of its proper divisors (1).

53015551 is an equidigital number, since it uses as much as digits as its factorization.

53015551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 53015551 is about 7281.1778580117. The cubic root of 53015551 is about 375.6653101941.

Adding to 53015551 its reverse (15551035), we get a palindrome (68566586).

The spelling of 53015551 in words is "fifty-three million, fifteen thousand, five hundred fifty-one".