209283157 has 8 divisors (see below), whose sum is σ = 220729760. Its totient is φ = 197879760.

The previous prime is 209283133. The next prime is 209283181. The reversal of 209283157 is 751382902.

209283157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (209283133) and next prime (209283181).

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

It is a cyclic number.

It is not a de Polignac number, because 209283157 - 2²³ = 200894549 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 (209283197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594 + ... + 20467.

It is an arithmetic number, because the mean of its divisors is an integer number (27591220).

Almost surely, 2^209283157 is an apocalyptic number.

It is an amenable number.

209283157 is a deficient number, since it is larger than the sum of its proper divisors (11446603).

209283157 is a wasteful number, since it uses less digits than its factorization.

209283157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21603.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 209283157 is about 14466.6221696704. The cubic root of 209283157 is about 593.7150974571.

The spelling of 209283157 in words is "two hundred nine million, two hundred eighty-three thousand, one hundred fifty-seven".