53531145 has 16 divisors (see below), whose sum is σ = 95166720. Its totient is φ = 28549872.

The previous prime is 53531131. The next prime is 53531171. The reversal of 53531145 is 54113535.

It is not a de Polignac number, because 53531145 - 2¹⁰ = 53530121 is a prime.

It is a super-2 number, since 2×53531145² = 5731166970022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198129 + ... + 198398.

It is an arithmetic number, because the mean of its divisors is an integer number (5947920).

Almost surely, 2^53531145 is an apocalyptic number.

It is an amenable number.

53531145 is a deficient number, since it is larger than the sum of its proper divisors (41635575).

53531145 is a wasteful number, since it uses less digits than its factorization.

53531145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396541 (or 396535 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 53531145 is about 7316.4981377706. The cubic root of 53531145 is about 376.8792071509.

The spelling of 53531145 in words is "fifty-three million, five hundred thirty-one thousand, one hundred forty-five".