2251612215 has 32 divisors (see below), whose sum is σ = 4005576960. Its totient is φ = 1200046752.

The previous prime is 2251612213. The next prime is 2251612217. The reversal of 2251612215 is 5122161522.

2251612215 is a `hidden beast` number, since 2 + 25 + 1 + 612 + 21 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (2251612213) and next prime (2251612217).

It is not a de Polignac number, because 2251612215 - 2¹ = 2251612213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251612213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 231072 + ... + 240618.

It is an arithmetic number, because the mean of its divisors is an integer number (125174280).

Almost surely, 2^2251612215 is an apocalyptic number.

2251612215 is a deficient number, since it is larger than the sum of its proper divisors (1753964745).

2251612215 is a wasteful number, since it uses less digits than its factorization.

2251612215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11308 (or 11302 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 2251612215 is about 47451.1560976126. The cubic root of 2251612215 is about 1310.6836000536.

Adding to 2251612215 its reverse (5122161522), we get a palindrome (7373773737).

The spelling of 2251612215 in words is "two billion, two hundred fifty-one million, six hundred twelve thousand, two hundred fifteen".