2251517238 has 24 divisors (see below), whose sum is σ = 4991737608. Its totient is φ = 733051872.

The previous prime is 2251517209. The next prime is 2251517239. The reversal of 2251517238 is 8327151522.

2251517238 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2251517238² = 10138659746022297288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251517239) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1453695 + ... + 1455242.

It is an arithmetic number, because the mean of its divisors is an integer number (207989067).

Almost surely, 2^2251517238 is an apocalyptic number.

2251517238 is an abundant number, since it is smaller than the sum of its proper divisors (2740220370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251517238 is a wasteful number, since it uses less digits than its factorization.

2251517238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908988 (or 2908985 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 2251517238 is about 47450.1553000620. The cubic root of 2251517238 is about 1310.6651708076.

The spelling of 2251517238 in words is "two billion, two hundred fifty-one million, five hundred seventeen thousand, two hundred thirty-eight".