2251542121 has 8 divisors (see below), whose sum is σ = 2326924544. Its totient is φ = 2176331760.

The previous prime is 2251542113. The next prime is 2251542127. The reversal of 2251542121 is 1212451522.

2251542121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2251542121 - 2³ = 2251542113 is a prime.

It is a super-3 number, since 3×2251542121³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251542127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16131 + ... + 69016.

It is an arithmetic number, because the mean of its divisors is an integer number (290865568).

Almost surely, 2^2251542121 is an apocalyptic number.

It is an amenable number.

2251542121 is a deficient number, since it is larger than the sum of its proper divisors (75382423).

2251542121 is an equidigital number, since it uses as much as digits as its factorization.

2251542121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86031.

The product of its digits is 1600, while the sum is 25.

The square root of 2251542121 is about 47450.4175007976. The cubic root of 2251542121 is about 1310.6699991311.

Adding to 2251542121 its reverse (1212451522), we get a palindrome (3463993643).

The spelling of 2251542121 in words is "two billion, two hundred fifty-one million, five hundred forty-two thousand, one hundred twenty-one".