205629157 has 4 divisors (see below), whose sum is σ = 206290656. Its totient is φ = 204967660.

The previous prime is 205629133. The next prime is 205629167. The reversal of 205629157 is 751926502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 751926502 = 2 ⋅375963251.

It is not a de Polignac number, because 205629157 - 2¹⁵ = 205596389 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 (205629167) 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 3 ways as a sum of consecutive naturals, for example, 330283 + ... + 330904.

It is an arithmetic number, because the mean of its divisors is an integer number (51572664).

Almost surely, 2^205629157 is an apocalyptic number.

It is an amenable number.

205629157 is a deficient number, since it is larger than the sum of its proper divisors (661499).

205629157 is an equidigital number, since it uses as much as digits as its factorization.

205629157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661498.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 205629157 is about 14339.7753469153. The cubic root of 205629157 is about 590.2394479582.

It can be divided in two parts, 2056 and 29157, that added together give a palindrome (31213).

The spelling of 205629157 in words is "two hundred five million, six hundred twenty-nine thousand, one hundred fifty-seven".