145331613 has 12 divisors (see below), whose sum is σ = 239912608. Its totient is φ = 83046600.

The previous prime is 145331569. The next prime is 145331629. The reversal of 145331613 is 316133541.

145331613 is a `hidden beast` number, since 1 + 45 + 3 + 3 + 1 + 613 = 666.

145331613 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 145331613 - 2¹² = 145327517 is a prime.

It is a super-2 number, since 2×145331613² = 42242555474363538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145331213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1153363 + ... + 1153488.

Almost surely, 2^145331613 is an apocalyptic number.

It is an amenable number.

145331613 is a deficient number, since it is larger than the sum of its proper divisors (94580995).

145331613 is a wasteful number, since it uses less digits than its factorization.

145331613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306864 (or 2306861 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 145331613 is about 12055.3561954842. The cubic root of 145331613 is about 525.7589784270.

The spelling of 145331613 in words is "one hundred forty-five million, three hundred thirty-one thousand, six hundred thirteen".