2154204538 has 8 divisors (see below), whose sum is σ = 3421383732. Its totient is φ = 1013743296.

The previous prime is 2154204527. The next prime is 2154204551. The reversal of 2154204538 is 8354024512.

It can be written as a sum of positive squares in 2 ways, for example, as 1798014409 + 356190129 = 42403^2 + 18873^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 63358957 = 2154204538 / (2 + 1 + 5 + 4 + 2 + 0 + 4 + 5 + 3 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31679445 + ... + 31679512.

Almost surely, 2^2154204538 is an apocalyptic number.

2154204538 is a deficient number, since it is larger than the sum of its proper divisors (1267179194).

2154204538 is a wasteful number, since it uses less digits than its factorization.

2154204538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63358976.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 2154204538 is about 46413.4090323044. The cubic root of 2154204538 is about 1291.5036725377.

The spelling of 2154204538 in words is "two billion, one hundred fifty-four million, two hundred four thousand, five hundred thirty-eight".