2251674878 has 4 divisors (see below), whose sum is σ = 3377512320. Its totient is φ = 1125837438.

The previous prime is 2251674877. The next prime is 2251674881. The reversal of 2251674878 is 8784761522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8784761522 = 2 ⋅4392380761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251674877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562918718 + ... + 562918721.

It is an arithmetic number, because the mean of its divisors is an integer number (844378080).

Almost surely, 2^2251674878 is an apocalyptic number.

2251674878 is a deficient number, since it is larger than the sum of its proper divisors (1125837442).

2251674878 is a wasteful number, since it uses less digits than its factorization.

2251674878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125837441.

The product of its digits is 1505280, while the sum is 50.

The square root of 2251674878 is about 47451.8163825159. The cubic root of 2251674878 is about 1310.6957588383.

The spelling of 2251674878 in words is "two billion, two hundred fifty-one million, six hundred seventy-four thousand, eight hundred seventy-eight".