101591151 has 4 divisors (see below), whose sum is σ = 135454872. Its totient is φ = 67727432.

The previous prime is 101591143. The next prime is 101591173. The reversal of 101591151 is 151195101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151195101 = 3 ⋅50398367.

It is a cyclic number.

It is not a de Polignac number, because 101591151 - 2³ = 101591143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101591141) by changing a digit.

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, 16931856 + ... + 16931861.

It is an arithmetic number, because the mean of its divisors is an integer number (33863718).

Almost surely, 2^101591151 is an apocalyptic number.

101591151 is a deficient number, since it is larger than the sum of its proper divisors (33863721).

101591151 is an equidigital number, since it uses as much as digits as its factorization.

101591151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33863720.

The product of its (nonzero) digits is 225, while the sum is 24.

The square root of 101591151 is about 10079.2435728084. The cubic root of 101591151 is about 466.6077633704.

The spelling of 101591151 in words is "one hundred one million, five hundred ninety-one thousand, one hundred fifty-one".