157228905 has 16 divisors (see below), whose sum is σ = 252835200. Its totient is φ = 83432448.

The previous prime is 157228879. The next prime is 157228927. The reversal of 157228905 is 509822751.

It is not a de Polignac number, because 157228905 - 2¹¹ = 157226857 is a prime.

It is a super-4 number, since 4×157228905⁴ (a number of 34 digits) contains 4444 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23352 + ... + 29321.

It is an arithmetic number, because the mean of its divisors is an integer number (15802200).

Almost surely, 2^157228905 is an apocalyptic number.

157228905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157228905 is a deficient number, since it is larger than the sum of its proper divisors (95606295).

157228905 is a wasteful number, since it uses less digits than its factorization.

157228905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52880.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 157228905 is about 12539.0950630418. The cubic root of 157228905 is about 539.7311247180.

The spelling of 157228905 in words is "one hundred fifty-seven million, two hundred twenty-eight thousand, nine hundred five".