2125631405 has 16 divisors (see below), whose sum is σ = 2644683264. Its totient is φ = 1638373440.

The previous prime is 2125631399. The next prime is 2125631419. The reversal of 2125631405 is 5041365212.

It is not a de Polignac number, because 2125631405 - 2⁸ = 2125631149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4979 + ... + 65391.

It is an arithmetic number, because the mean of its divisors is an integer number (165292704).

Almost surely, 2^2125631405 is an apocalyptic number.

It is an amenable number.

2125631405 is a deficient number, since it is larger than the sum of its proper divisors (519051859).

2125631405 is a wasteful number, since it uses less digits than its factorization.

2125631405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60676.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2125631405 is about 46104.5703265956. The cubic root of 2125631405 is about 1285.7681176255.

Adding to 2125631405 its reverse (5041365212), we get a palindrome (7166996617).

The spelling of 2125631405 in words is "two billion, one hundred twenty-five million, six hundred thirty-one thousand, four hundred five".