25212552155 has 8 divisors (see below), whose sum is σ = 34577214432. Its totient is φ = 17288607168.

The previous prime is 25212552133. The next prime is 25212552163. The reversal of 25212552155 is 55125521252.

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

It is not a de Polignac number, because 25212552155 - 2¹² = 25212548059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 720358633 = 25212552155 / (2 + 5 + 2 + 1 + 2 + 5 + 5 + 2 + 1 + 5 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360179282 + ... + 360179351.

It is an arithmetic number, because the mean of its divisors is an integer number (4322151804).

Almost surely, 2^25212552155 is an apocalyptic number.

25212552155 is a deficient number, since it is larger than the sum of its proper divisors (9364662277).

25212552155 is an equidigital number, since it uses as much as digits as its factorization.

25212552155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720358645.

The product of its digits is 50000, while the sum is 35.

The spelling of 25212552155 in words is "twenty-five billion, two hundred twelve million, five hundred fifty-two thousand, one hundred fifty-five".