145123331 has 8 divisors (see below), whose sum is σ = 147878928. Its totient is φ = 142380000.

The previous prime is 145123327. The next prime is 145123411. The reversal of 145123331 is 133321541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145123331 - 2² = 145123327 is a prime.

It is a super-2 number, since 2×145123331² = 42121562401071122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145123297 and 145123306.

It is not an unprimeable number, because it can be changed into a prime (145123631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22856 + ... + 28506.

It is an arithmetic number, because the mean of its divisors is an integer number (18484866).

Almost surely, 2^145123331 is an apocalyptic number.

145123331 is a deficient number, since it is larger than the sum of its proper divisors (2755597).

145123331 is an equidigital number, since it uses as much as digits as its factorization.

145123331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6133.

The product of its digits is 1080, while the sum is 23.

The square root of 145123331 is about 12046.7145313567. The cubic root of 145123331 is about 525.5076945210.

Adding to 145123331 its reverse (133321541), we get a palindrome (278444872).

The spelling of 145123331 in words is "one hundred forty-five million, one hundred twenty-three thousand, three hundred thirty-one".