Search a number
BaseRepresentation
bin11001001111100001…
…10110101000111001
31021222110111221120121
430213300312220321
5210223304120100
610120430453241
7656555161315
oct144760665071
937873457517
1013552020025
115824842255
122762664221
13137c86b77b
14927bc2b45
15544b4351a
hex327c36a39

13552020025 has 6 divisors (see below), whose sum is σ = 16804504862. Its totient is φ = 10841616000.

The previous prime is 13552020019. The next prime is 13552020029. The reversal of 13552020025 is 52002025531.

Adding to 13552020025 its reverse (52002025531), we get a palindrome (65554045556).

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 3231695104 + 10320324921 = 56848^2 + 101589^2 .

It is not a de Polignac number, because 13552020025 - 23 = 13552020017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 542080801 = 13552020025 / (1 + 3 + 5 + 5 + 2 + 0 + 2 + 0 + 0 + 2 + 5).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13552020029) 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, 271040376 + ... + 271040425.

Almost surely, 213552020025 is an apocalyptic number.

It is an amenable number.

13552020025 is a deficient number, since it is larger than the sum of its proper divisors (3252484837).

13552020025 is an equidigital number, since it uses as much as digits as its factorization.

13552020025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542080811 (or 542080806 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 13552020025 in words is "thirteen billion, five hundred fifty-two million, twenty thousand, twenty-five".

Divisors: 1 5 25 542080801 2710404005 13552020025