15838474201 has 27 divisors (see below), whose sum is σ = 18521064093. Its totient is φ = 13531499520.

The previous prime is 15838474189. The next prime is 15838474217. The reversal of 15838474201 is 10247483851.

The square root of 15838474201 is 125851.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 223472601 + 15615001600 = 14949^2 + 124960^2 .

It is not a de Polignac number, because 15838474201 - 2¹⁹ = 15837949913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15838474901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 23533801 + ... + 23534473.

Almost surely, 2^15838474201 is an apocalyptic number.

15838474201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15838474201 is the 125851-st square number.

15838474201 is the 62926-th centered octagonal number.

It is an amenable number.

15838474201 is a deficient number, since it is larger than the sum of its proper divisors (2682589892).

15838474201 is an frugal number, since it uses more digits than its factorization.

15838474201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 15838474201 in words is "fifteen billion, eight hundred thirty-eight million, four hundred seventy-four thousand, two hundred one".