27725151 has 4 divisors (see below), whose sum is σ = 36966872. Its totient is φ = 18483432.

The previous prime is 27725149. The next prime is 27725177. The reversal of 27725151 is 15152772.

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

It is not a de Polignac number, because 27725151 - 2¹ = 27725149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27725141) 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, 4620856 + ... + 4620861.

It is an arithmetic number, because the mean of its divisors is an integer number (9241718).

Almost surely, 2^27725151 is an apocalyptic number.

27725151 is a deficient number, since it is larger than the sum of its proper divisors (9241721).

27725151 is an equidigital number, since it uses as much as digits as its factorization.

27725151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9241720.

The product of its digits is 4900, while the sum is 30.

The square root of 27725151 is about 5265.4677854869. The cubic root of 27725151 is about 302.6620528244.

Adding to 27725151 its sum of digits (30), we get a triangular number (27725181 = T₇₄₄₆).

The spelling of 27725151 in words is "twenty-seven million, seven hundred twenty-five thousand, one hundred fifty-one".