2146540251 has 16 divisors (see below), whose sum is σ = 2988115200. Its totient is φ = 1368063840.

The previous prime is 2146540229. The next prime is 2146540283. The reversal of 2146540251 is 1520456412.

It is not a de Polignac number, because 2146540251 - 2⁹ = 2146539739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2146540051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137421 + ... + 152241.

It is an arithmetic number, because the mean of its divisors is an integer number (186757200).

Almost surely, 2^2146540251 is an apocalyptic number.

2146540251 is a deficient number, since it is larger than the sum of its proper divisors (841574949).

2146540251 is a wasteful number, since it uses less digits than its factorization.

2146540251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16946.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2146540251 is about 46330.7700238189. The cubic root of 2146540251 is about 1289.9702036264.

Adding to 2146540251 its reverse (1520456412), we get a palindrome (3666996663).

It can be divided in two parts, 21465 and 40251, that added together give a palindrome (61716).

The spelling of 2146540251 in words is "two billion, one hundred forty-six million, five hundred forty thousand, two hundred fifty-one".