2251500405 has 64 divisors (see below), whose sum is σ = 4646246400. Its totient is φ = 903409920.

The previous prime is 2251500401. The next prime is 2251500421. The reversal of 2251500405 is 5040051522.

It is a happy number.

2251500405 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2251500405 - 2² = 2251500401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251500401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 115 + ... + 67104.

It is an arithmetic number, because the mean of its divisors is an integer number (72597600).

Almost surely, 2^2251500405 is an apocalyptic number.

It is an amenable number.

2251500405 is an abundant number, since it is smaller than the sum of its proper divisors (2394745995).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251500405 is a wasteful number, since it uses less digits than its factorization.

2251500405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67274.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 2251500405 is about 47449.9779241255. The cubic root of 2251500405 is about 1310.6619044943.

Adding to 2251500405 its reverse (5040051522), we get a palindrome (7291551927).

The spelling of 2251500405 in words is "two billion, two hundred fifty-one million, five hundred thousand, four hundred five".