145151613 has 12 divisors (see below), whose sum is σ = 212020380. Its totient is φ = 95679936.

The previous prime is 145151609. The next prime is 145151647. The reversal of 145151613 is 316151541.

145151613 is a `hidden beast` number, since 1 + 45 + 1 + 5 + 1 + 613 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11471769 + 133679844 = 3387^2 + 11562^2 .

It is not a de Polignac number, because 145151613 - 2² = 145151609 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145151653) 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, 89806 + ... + 91407.

It is an arithmetic number, because the mean of its divisors is an integer number (17668365).

Almost surely, 2^145151613 is an apocalyptic number.

It is an amenable number.

145151613 is a deficient number, since it is larger than the sum of its proper divisors (66868767).

145151613 is a wasteful number, since it uses less digits than its factorization.

145151613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181308 (or 181305 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 145151613 is about 12047.8883211955. Note that the first 3 decimals coincide. The cubic root of 145151613 is about 525.5418297243.

The spelling of 145151613 in words is "one hundred forty-five million, one hundred fifty-one thousand, six hundred thirteen".