2125178473 has 4 divisors (see below), whose sum is σ = 2318376528. Its totient is φ = 1931980420.

The previous prime is 2125178441. The next prime is 2125178501. The reversal of 2125178473 is 3748715212.

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 2125178473 - 2⁵ = 2125178441 is a prime.

It is a super-2 number, since 2×2125178473² = 9032767084205223458, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125178413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96599011 + ... + 96599032.

It is an arithmetic number, because the mean of its divisors is an integer number (579594132).

Almost surely, 2^2125178473 is an apocalyptic number.

It is an amenable number.

2125178473 is a deficient number, since it is larger than the sum of its proper divisors (193198055).

2125178473 is a wasteful number, since it uses less digits than its factorization.

2125178473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193198054.

The product of its digits is 94080, while the sum is 40.

The square root of 2125178473 is about 46099.6580573002. The cubic root of 2125178473 is about 1285.6767868187.

The spelling of 2125178473 in words is "two billion, one hundred twenty-five million, one hundred seventy-eight thousand, four hundred seventy-three".