5121002165 has 4 divisors (see below), whose sum is σ = 6145202604. Its totient is φ = 4096801728.

The previous prime is 5121002147. The next prime is 5121002269. The reversal of 5121002165 is 5612001215.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 776346769 + 4344655396 = 27863^2 + 65914^2 .

It is a cyclic number.

It is not a de Polignac number, because 5121002165 - 2¹⁶ = 5120936629 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5121002165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512100212 + ... + 512100221.

It is an arithmetic number, because the mean of its divisors is an integer number (1536300651).

Almost surely, 2^5121002165 is an apocalyptic number.

It is an amenable number.

5121002165 is a deficient number, since it is larger than the sum of its proper divisors (1024200439).

5121002165 is a wasteful number, since it uses less digits than its factorization.

5121002165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024200438.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 5121002165 is about 71561.1777781780. The cubic root of 5121002165 is about 1723.6601977643.

The spelling of 5121002165 in words is "five billion, one hundred twenty-one million, two thousand, one hundred sixty-five".