53215155 has 24 divisors (see below), whose sum is σ = 105417312. Its totient is φ = 24326784.

The previous prime is 53215153. The next prime is 53215163. The reversal of 53215155 is 55151235.

It is not a de Polignac number, because 53215155 - 2¹ = 53215153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53215153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84154 + ... + 84783.

It is an arithmetic number, because the mean of its divisors is an integer number (4392388).

Almost surely, 2^53215155 is an apocalyptic number.

53215155 is a deficient number, since it is larger than the sum of its proper divisors (52202157).

53215155 is a wasteful number, since it uses less digits than its factorization.

53215155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168955 (or 168952 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 53215155 is about 7294.8718288946. The cubic root of 53215155 is about 376.1361807720.

The spelling of 53215155 in words is "fifty-three million, two hundred fifteen thousand, one hundred fifty-five".