145235531 has 8 divisors (see below), whose sum is σ = 166305024. Its totient is φ = 124246440.

The previous prime is 145235507. The next prime is 145235533. The reversal of 145235531 is 135532541.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145235531 is a prime.

It is a super-2 number, since 2×145235531² = 42186718929703922, 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 = 145235494 and 145235503.

It is not an unprimeable number, because it can be changed into a prime (145235533) 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, 16175 + ... + 23496.

It is an arithmetic number, because the mean of its divisors is an integer number (20788128).

Almost surely, 2^145235531 is an apocalyptic number.

145235531 is a deficient number, since it is larger than the sum of its proper divisors (21069493).

145235531 is an equidigital number, since it uses as much as digits as its factorization.

145235531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40201.

The product of its digits is 9000, while the sum is 29.

The square root of 145235531 is about 12051.3705029760. The cubic root of 145235531 is about 525.6430891866.

The spelling of 145235531 in words is "one hundred forty-five million, two hundred thirty-five thousand, five hundred thirty-one".