2387478604221 has 6 divisors (see below), whose sum is σ = 3448580206110. Its totient is φ = 1591652402808.

The previous prime is 2387478604219. The next prime is 2387478604237. The reversal of 2387478604221 is 1224068747832.

2387478604221 is a `hidden beast` number, since 2 + 3 + 8 + 7 + 4 + 7 + 8 + 604 + 2 + 21 = 666.

2387478604221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2119557456900 + 267921147321 = 1455870^2 + 517611^2 .

It is not a de Polignac number, because 2387478604221 - 2¹ = 2387478604219 is a prime.

It is a super-2 number, since 2×2387478604221² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2387478604321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 132637700226 + ... + 132637700243.

It is an arithmetic number, because the mean of its divisors is an integer number (574763367685).

Almost surely, 2^{2387478604221} is an apocalyptic number.

It is an amenable number.

2387478604221 is a deficient number, since it is larger than the sum of its proper divisors (1061101601889).

2387478604221 is a wasteful number, since it uses less digits than its factorization.

2387478604221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265275400475 (or 265275400472 counting only the distinct ones).

The product of its (nonzero) digits is 7225344, while the sum is 54.

The spelling of 2387478604221 in words is "two trillion, three hundred eighty-seven billion, four hundred seventy-eight million, six hundred four thousand, two hundred twenty-one".