151668513 has 12 divisors (see below), whose sum is σ = 224998228. Its totient is φ = 98379360.

The previous prime is 151668511. The next prime is 151668533. The reversal of 151668513 is 315866151.

It can be written as a sum of positive squares in 2 ways, for example, as 139641489 + 12027024 = 11817^2 + 3468^2 .

It is not a de Polignac number, because 151668513 - 2¹ = 151668511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (151668511) 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, 227398 + ... + 228063.

Almost surely, 2^151668513 is an apocalyptic number.

It is an amenable number.

151668513 is a deficient number, since it is larger than the sum of its proper divisors (73329715).

151668513 is a wasteful number, since it uses less digits than its factorization.

151668513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455504 (or 455501 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 151668513 is about 12315.3770953227. The cubic root of 151668513 is about 533.2920910383.

The spelling of 151668513 in words is "one hundred fifty-one million, six hundred sixty-eight thousand, five hundred thirteen".