151621105 has 4 divisors (see below), whose sum is σ = 181945332. Its totient is φ = 121296880.

The previous prime is 151621087. The next prime is 151621111. The reversal of 151621105 is 501126151.

It is a happy number.

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 99680256 + 51940849 = 9984^2 + 7207^2 .

It is not a de Polignac number, because 151621105 - 2⁹ = 151620593 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15162106 + ... + 15162115.

It is an arithmetic number, because the mean of its divisors is an integer number (45486333).

Almost surely, 2^151621105 is an apocalyptic number.

It is an amenable number.

151621105 is a deficient number, since it is larger than the sum of its proper divisors (30324227).

151621105 is an equidigital number, since it uses as much as digits as its factorization.

151621105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30324226.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 151621105 is about 12313.4521966831. The cubic root of 151621105 is about 533.2365204046.

Adding to 151621105 its reverse (501126151), we get a palindrome (652747256).

The spelling of 151621105 in words is "one hundred fifty-one million, six hundred twenty-one thousand, one hundred five".