2251631377 has 4 divisors (see below), whose sum is σ = 2280133120. Its totient is φ = 2223129636.

The previous prime is 2251631359. The next prime is 2251631407. The reversal of 2251631377 is 7731361522.

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 a de Polignac number, because none of the positive numbers 2^k-2251631377 is a prime.

It is a super-2 number, since 2×2251631377² = 10139687715781832258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251631177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14250753 + ... + 14250910.

It is an arithmetic number, because the mean of its divisors is an integer number (570033280).

Almost surely, 2^2251631377 is an apocalyptic number.

It is an amenable number.

2251631377 is a deficient number, since it is larger than the sum of its proper divisors (28501743).

2251631377 is an equidigital number, since it uses as much as digits as its factorization.

2251631377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28501742.

The product of its digits is 52920, while the sum is 37.

The square root of 2251631377 is about 47451.3580100717. The cubic root of 2251631377 is about 1310.6873181669.

Adding to 2251631377 its reverse (7731361522), we get a palindrome (9982992899).

The spelling of 2251631377 in words is "two billion, two hundred fifty-one million, six hundred thirty-one thousand, three hundred seventy-seven".