141551665 has 4 divisors (see below), whose sum is σ = 169862004. Its totient is φ = 113241328.

The previous prime is 141551633. The next prime is 141551681. The reversal of 141551665 is 566155141.

141551665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566155141 = 19 ⋅29797639.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 124634896 = 4113^2 + 11164^2 .

It is a cyclic number.

It is not a de Polignac number, because 141551665 - 2⁵ = 141551633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 141551665.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14155162 + ... + 14155171.

It is an arithmetic number, because the mean of its divisors is an integer number (42465501).

Almost surely, 2^141551665 is an apocalyptic number.

It is an amenable number.

141551665 is a deficient number, since it is larger than the sum of its proper divisors (28310339).

141551665 is an equidigital number, since it uses as much as digits as its factorization.

141551665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28310338.

The product of its digits is 18000, while the sum is 34.

The square root of 141551665 is about 11897.5486971056. The cubic root of 141551665 is about 521.1607023638.

The spelling of 141551665 in words is "one hundred forty-one million, five hundred fifty-one thousand, six hundred sixty-five".