2518226381 has 4 divisors (see below), whose sum is σ = 2747156064. Its totient is φ = 2289296700.

The previous prime is 2518226353. The next prime is 2518226411. The reversal of 2518226381 is 1836228152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2518226381 - 2¹⁴ = 2518209997 is a prime.

It is a super-2 number, since 2×2518226381² = 12682928211928714322, 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 (2518226311) 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, 114464825 + ... + 114464846.

It is an arithmetic number, because the mean of its divisors is an integer number (686789016).

Almost surely, 2^2518226381 is an apocalyptic number.

It is an amenable number.

2518226381 is a deficient number, since it is larger than the sum of its proper divisors (228929683).

2518226381 is a wasteful number, since it uses less digits than its factorization.

2518226381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228929682.

The product of its digits is 46080, while the sum is 38.

The square root of 2518226381 is about 50181.9328145100. The cubic root of 2518226381 is about 1360.4990925200.

The spelling of 2518226381 in words is "two billion, five hundred eighteen million, two hundred twenty-six thousand, three hundred eighty-one".