81350157 has 8 divisors (see below), whose sum is σ = 123962176. Its totient is φ = 46485792.

The previous prime is 81350123. The next prime is 81350197. The reversal of 81350157 is 75105318.

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

It is not a de Polignac number, because 81350157 - 2¹⁰ = 81349133 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 (81350197) 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 7 ways as a sum of consecutive naturals, for example, 1936888 + ... + 1936929.

It is an arithmetic number, because the mean of its divisors is an integer number (15495272).

Almost surely, 2^81350157 is an apocalyptic number.

It is an amenable number.

81350157 is a deficient number, since it is larger than the sum of its proper divisors (42612019).

81350157 is a wasteful number, since it uses less digits than its factorization.

81350157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873827.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 81350157 is about 9019.4321883365. The cubic root of 81350157 is about 433.2974486392.

The spelling of 81350157 in words is "eighty-one million, three hundred fifty thousand, one hundred fifty-seven".