157220205 has 16 divisors (see below), whose sum is σ = 251887104. Its totient is φ = 83739200.

The previous prime is 157220197. The next prime is 157220221. The reversal of 157220205 is 502022751.

It is not a de Polignac number, because 157220205 - 2³ = 157220197 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5380 + ... + 18530.

It is an arithmetic number, because the mean of its divisors is an integer number (15742944).

Almost surely, 2^157220205 is an apocalyptic number.

157220205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157220205 is a deficient number, since it is larger than the sum of its proper divisors (94666899).

157220205 is a wasteful number, since it uses less digits than its factorization.

157220205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13956.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 157220205 is about 12538.7481432558. The cubic root of 157220205 is about 539.7211694929.

Adding to 157220205 its reverse (502022751), we get a palindrome (659242956).

The spelling of 157220205 in words is "one hundred fifty-seven million, two hundred twenty thousand, two hundred five".