2125555397 has 4 divisors (see below), whose sum is σ = 2429206176. Its totient is φ = 1821904620.

The previous prime is 2125555363. The next prime is 2125555409. The reversal of 2125555397 is 7935555212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125555397 - 2¹⁰ = 2125554373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125555357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151825379 + ... + 151825392.

It is an arithmetic number, because the mean of its divisors is an integer number (607301544).

Almost surely, 2^2125555397 is an apocalyptic number.

It is an amenable number.

2125555397 is a deficient number, since it is larger than the sum of its proper divisors (303650779).

2125555397 is an equidigital number, since it uses as much as digits as its factorization.

2125555397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303650778.

The product of its digits is 472500, while the sum is 44.

The square root of 2125555397 is about 46103.7460191686. The cubic root of 2125555397 is about 1285.7527920102.

The spelling of 2125555397 in words is "two billion, one hundred twenty-five million, five hundred fifty-five thousand, three hundred ninety-seven".