2158203204 has 60 divisors (see below), whose sum is σ = 5660036844. Its totient is φ = 717097536.

The previous prime is 2158203197. The next prime is 2158203211. The reversal of 2158203204 is 4023028512.

It is an interprime number because it is at equal distance from previous prime (2158203197) and next prime (2158203211).

It can be written as a sum of positive squares in 2 ways, for example, as 33177600 + 2125025604 = 5760^2 + 46098^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92202 + ... + 113214.

Almost surely, 2^2158203204 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 2158203204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2830018422).

2158203204 is an abundant number, since it is smaller than the sum of its proper divisors (3501833640).

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

2158203204 is a wasteful number, since it uses less digits than its factorization.

2158203204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21346 (or 21335 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 2158203204 is about 46456.4656856287. The cubic root of 2158203204 is about 1292.3022812862.

It can be divided in two parts, 215820 and 3204, that added together give a square (219024 = 468²).

The spelling of 2158203204 in words is "two billion, one hundred fifty-eight million, two hundred three thousand, two hundred four".