53231145 has 16 divisors (see below), whose sum is σ = 92912832. Its totient is φ = 25808960.

The previous prime is 53231117. The next prime is 53231147. The reversal of 53231145 is 54113235.

53231145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53231145 - 2¹¹ = 53229097 is a prime.

It is a super-2 number, since 2×53231145² = 5667109596022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53231147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161142 + ... + 161471.

It is an arithmetic number, because the mean of its divisors is an integer number (5807052).

Almost surely, 2^53231145 is an apocalyptic number.

53231145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53231145 is a deficient number, since it is larger than the sum of its proper divisors (39681687).

53231145 is a wasteful number, since it uses less digits than its factorization.

53231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322632.

The product of its digits is 1800, while the sum is 24.

The square root of 53231145 is about 7295.9677219681. The cubic root of 53231145 is about 376.1738505877.

The spelling of 53231145 in words is "fifty-three million, two hundred thirty-one thousand, one hundred forty-five".