151661465 has 4 divisors (see below), whose sum is σ = 181993764. Its totient is φ = 121329168.

The previous prime is 151661453. The next prime is 151661491. The reversal of 151661465 is 564166151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116294656 + 35366809 = 10784^2 + 5947^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151661465 is a prime.

It is a Duffinian number.

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, 15166142 + ... + 15166151.

It is an arithmetic number, because the mean of its divisors is an integer number (45498441).

Almost surely, 2^151661465 is an apocalyptic number.

It is an amenable number.

151661465 is a deficient number, since it is larger than the sum of its proper divisors (30332299).

151661465 is an equidigital number, since it uses as much as digits as its factorization.

151661465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30332298.

The product of its digits is 21600, while the sum is 35.

The square root of 151661465 is about 12315.0909456650. The cubic root of 151661465 is about 533.2838302578.

It can be divided in two parts, 15166146 and 5, that added together give a palindrome (15166151).

The spelling of 151661465 in words is "one hundred fifty-one million, six hundred sixty-one thousand, four hundred sixty-five".