5165052421 has 4 divisors (see below), whose sum is σ = 5468879052. Its totient is φ = 4861225792.

The previous prime is 5165052419. The next prime is 5165052427. The reversal of 5165052421 is 1242505615.

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 2968724196 + 2196328225 = 54486^2 + 46865^2 .

It is a cyclic number.

It is not a de Polignac number, because 5165052421 - 2¹ = 5165052419 is a prime.

It is a super-2 number, since 2×5165052421² = 53355533023355922482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5165052427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151913290 + ... + 151913323.

It is an arithmetic number, because the mean of its divisors is an integer number (1367219763).

Almost surely, 2^5165052421 is an apocalyptic number.

It is an amenable number.

5165052421 is a deficient number, since it is larger than the sum of its proper divisors (303826631).

5165052421 is a wasteful number, since it uses less digits than its factorization.

5165052421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303826630.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 5165052421 is about 71868.2991380762. The cubic root of 5165052421 is about 1728.5883347464.

The spelling of 5165052421 in words is "five billion, one hundred sixty-five million, fifty-two thousand, four hundred twenty-one".