611231145 has 32 divisors (see below), whose sum is σ = 1140499200. Its totient is φ = 279417600.

The previous prime is 611231077. The next prime is 611231147. The reversal of 611231145 is 541132116.

It is a happy number.

611231145 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 611231145 - 2²⁰ = 610182569 is a prime.

It is a super-2 number, since 2×611231145² = 747207025236022050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (611231147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54256 + ... + 64545.

It is an arithmetic number, because the mean of its divisors is an integer number (35640600).

Almost surely, 2^611231145 is an apocalyptic number.

It is an amenable number.

611231145 is a deficient number, since it is larger than the sum of its proper divisors (529268055).

611231145 is a wasteful number, since it uses less digits than its factorization.

611231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118830 (or 118816 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 611231145 is about 24723.0893093885. The cubic root of 611231145 is about 848.6627855260.

The spelling of 611231145 in words is "six hundred eleven million, two hundred thirty-one thousand, one hundred forty-five".