181071157 has 8 divisors (see below), whose sum is σ = 195459840. Its totient is φ = 167225520.

The previous prime is 181071103. The next prime is 181071173. The reversal of 181071157 is 751170181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181071157 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 (181081157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135069 + ... + 136402.

It is an arithmetic number, because the mean of its divisors is an integer number (24432480).

Almost surely, 2^181071157 is an apocalyptic number.

It is an amenable number.

181071157 is a deficient number, since it is larger than the sum of its proper divisors (14388683).

181071157 is a wasteful number, since it uses less digits than its factorization.

181071157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271523.

The product of its (nonzero) digits is 1960, while the sum is 31.

The square root of 181071157 is about 13456.2683162904. The cubic root of 181071157 is about 565.7394000243.

The spelling of 181071157 in words is "one hundred eighty-one million, seventy-one thousand, one hundred fifty-seven".