151185901 has 4 divisors (see below), whose sum is σ = 154873404. Its totient is φ = 147498400.

The previous prime is 151185899. The next prime is 151185917. The reversal of 151185901 is 109581151.

151185901 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.

It can be written as a sum of positive squares in 2 ways, for example, as 86769225 + 64416676 = 9315^2 + 8026^2 .

It is a cyclic number.

It is not a de Polignac number, because 151185901 - 2¹ = 151185899 is a prime.

It is a super-2 number, since 2×151185901² = 45714353322363602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151180901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843690 + ... + 1843771.

It is an arithmetic number, because the mean of its divisors is an integer number (38718351).

Almost surely, 2^151185901 is an apocalyptic number.

It is an amenable number.

151185901 is a deficient number, since it is larger than the sum of its proper divisors (3687503).

151185901 is an equidigital number, since it uses as much as digits as its factorization.

151185901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687502.

The product of its (nonzero) digits is 1800, while the sum is 31.

The square root of 151185901 is about 12295.7676051558. The cubic root of 151185901 is about 532.7258415910.

The spelling of 151185901 in words is "one hundred fifty-one million, one hundred eighty-five thousand, nine hundred one".