157911273 has 12 divisors (see below), whose sum is σ = 245639940. Its totient is φ = 97176096.

The previous prime is 157911263. The next prime is 157911287. The reversal of 157911273 is 372119751.

157911273 is a `hidden beast` number, since 1 + 579 + 1 + 12 + 73 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 53626329 + 104284944 = 7323^2 + 10212^2 .

It is not a de Polignac number, because 157911273 - 2⁶ = 157911209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157911263) 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 11 ways as a sum of consecutive naturals, for example, 674718 + ... + 674951.

It is an arithmetic number, because the mean of its divisors is an integer number (20469995).

Almost surely, 2^157911273 is an apocalyptic number.

157911273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157911273 is a deficient number, since it is larger than the sum of its proper divisors (87728667).

157911273 is a wasteful number, since it uses less digits than its factorization.

157911273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349688 (or 1349685 counting only the distinct ones).

The product of its digits is 13230, while the sum is 36.

The square root of 157911273 is about 12566.2752237885. The cubic root of 157911273 is about 540.5108026719.

The spelling of 157911273 in words is "one hundred fifty-seven million, nine hundred eleven thousand, two hundred seventy-three".