2155415203 has 4 divisors (see below), whose sum is σ = 2155586328. Its totient is φ = 2155244080.

The previous prime is 2155415201. The next prime is 2155415209. The reversal of 2155415203 is 3025145512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155415203 - 2¹ = 2155415201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155415201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65026 + ... + 92407.

It is an arithmetic number, because the mean of its divisors is an integer number (538896582).

Almost surely, 2^2155415203 is an apocalyptic number.

2155415203 is a deficient number, since it is larger than the sum of its proper divisors (171125).

2155415203 is a wasteful number, since it uses less digits than its factorization.

2155415203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171124.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2155415203 is about 46426.4493904068. The cubic root of 2155415203 is about 1291.7455693255.

The spelling of 2155415203 in words is "two billion, one hundred fifty-five million, four hundred fifteen thousand, two hundred three".