2251511531 has 8 divisors (see below), whose sum is σ = 2322558480. Its totient is φ = 2181001248.

The previous prime is 2251511513. The next prime is 2251511539. The reversal of 2251511531 is 1351151522.

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 2251511531 - 2¹⁸ = 2251249387 is a prime.

It is a super-2 number, since 2×2251511531² = 10138608348451927922, which contains 22 as substring.

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 2251511531.

It is not an unprimeable number, because it can be changed into a prime (2251511539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125636 + ... + 142433.

It is an arithmetic number, because the mean of its divisors is an integer number (290319810).

Almost surely, 2^2251511531 is an apocalyptic number.

2251511531 is a deficient number, since it is larger than the sum of its proper divisors (71046949).

2251511531 is a wasteful number, since it uses less digits than its factorization.

2251511531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268333.

The product of its digits is 1500, while the sum is 26.

The square root of 2251511531 is about 47450.0951632344. The cubic root of 2251511531 is about 1310.6640634102.

The spelling of 2251511531 in words is "two billion, two hundred fifty-one million, five hundred eleven thousand, five hundred thirty-one".