2051421465 has 16 divisors (see below), whose sum is σ = 3284347968. Its totient is φ = 1093400256.

The previous prime is 2051421461. The next prime is 2051421481. The reversal of 2051421465 is 5641241502.

It is not a de Polignac number, because 2051421465 - 2² = 2051421461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2051421461) 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, 18199 + ... + 66588.

It is an arithmetic number, because the mean of its divisors is an integer number (205271748).

Almost surely, 2^2051421465 is an apocalyptic number.

It is an amenable number.

2051421465 is a deficient number, since it is larger than the sum of its proper divisors (1232926503).

2051421465 is a wasteful number, since it uses less digits than its factorization.

2051421465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86408.

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

The square root of 2051421465 is about 45292.6204254071. The cubic root of 2051421465 is about 1270.6276404550.

Adding to 2051421465 its reverse (5641241502), we get a palindrome (7692662967).

The spelling of 2051421465 in words is "two billion, fifty-one million, four hundred twenty-one thousand, four hundred sixty-five".