145956331 has 4 divisors (see below), whose sum is σ = 146059200. Its totient is φ = 145853464.

The previous prime is 145956323. The next prime is 145956353. The reversal of 145956331 is 133659541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133659541 = 859 ⋅155599.

It is a cyclic number.

It is not a de Polignac number, because 145956331 - 2³ = 145956323 is a prime.

It is a super-2 number, since 2×145956331² = 42606501117963122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145956361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49276 + ... + 52153.

It is an arithmetic number, because the mean of its divisors is an integer number (36514800).

Almost surely, 2^145956331 is an apocalyptic number.

145956331 is a deficient number, since it is larger than the sum of its proper divisors (102869).

145956331 is a wasteful number, since it uses less digits than its factorization.

145956331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102868.

The product of its digits is 48600, while the sum is 37.

The square root of 145956331 is about 12081.2388023745. The cubic root of 145956331 is about 526.5112386960.

The spelling of 145956331 in words is "one hundred forty-five million, nine hundred fifty-six thousand, three hundred thirty-one".