2251555454 has 4 divisors (see below), whose sum is σ = 3377333184. Its totient is φ = 1125777726.

The previous prime is 2251555433. The next prime is 2251555457. The reversal of 2251555454 is 4545551522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4545551522 = 2 ⋅2272775761.

It is a super-2 number, since 2×2251555454² = 10139003924874292232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251555457) 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 as a sum of consecutive naturals, namely, 562888862 + ... + 562888865.

It is an arithmetic number, because the mean of its divisors is an integer number (844333296).

Almost surely, 2^2251555454 is an apocalyptic number.

2251555454 is a deficient number, since it is larger than the sum of its proper divisors (1125777730).

2251555454 is a wasteful number, since it uses less digits than its factorization.

2251555454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125777729.

The product of its digits is 200000, while the sum is 38.

The square root of 2251555454 is about 47450.5579946116. The cubic root of 2251555454 is about 1310.6725862659.

The spelling of 2251555454 in words is "two billion, two hundred fifty-one million, five hundred fifty-five thousand, four hundred fifty-four".