5515222501 has 4 divisors (see below), whose sum is σ = 5839647372. Its totient is φ = 5190797632.

The previous prime is 5515222499. The next prime is 5515222507. The reversal of 5515222501 is 1052225155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1052225155 = 5 ⋅210445031.

It can be written as a sum of positive squares in 2 ways, for example, as 3607804225 + 1907418276 = 60065^2 + 43674^2 .

It is a cyclic number.

It is not a de Polignac number, because 5515222501 - 2¹ = 5515222499 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 5515222501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5515222507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162212410 + ... + 162212443.

It is an arithmetic number, because the mean of its divisors is an integer number (1459911843).

Almost surely, 2^5515222501 is an apocalyptic number.

It is an amenable number.

5515222501 is a deficient number, since it is larger than the sum of its proper divisors (324424871).

5515222501 is a wasteful number, since it uses less digits than its factorization.

5515222501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324424870.

The product of its (nonzero) digits is 5000, while the sum is 28.

The square root of 5515222501 is about 74264.5440368417. The cubic root of 5515222501 is about 1766.8011745497.

Adding to 5515222501 its reverse (1052225155), we get a palindrome (6567447656).

The spelling of 5515222501 in words is "five billion, five hundred fifteen million, two hundred twenty-two thousand, five hundred one".