203397156 has 60 divisors (see below), whose sum is σ = 536781168. Its totient is φ = 67153968.

The previous prime is 203397143. The next prime is 203397157. The reversal of 203397156 is 651793302.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 203397156.

It is not an unprimeable number, because it can be changed into a prime (203397157) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31735 + ... + 37601.

Almost surely, 2^203397156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203397156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268390584).

203397156 is an abundant number, since it is smaller than the sum of its proper divisors (333384012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203397156 is a wasteful number, since it uses less digits than its factorization.

203397156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990 (or 5979 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 203397156 is about 14261.7374818077. The cubic root of 203397156 is about 588.0960900855.

It can be divided in two parts, 20339 and 7156, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 203397156 in words is "two hundred three million, three hundred ninety-seven thousand, one hundred fifty-six".