551778022 has 4 divisors (see below), whose sum is σ = 827667036. Its totient is φ = 275889010.

The previous prime is 551778013. The next prime is 551778023. The reversal of 551778022 is 220877155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220877155 = 5 ⋅44175431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551778023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137944504 + ... + 137944507.

It is an arithmetic number, because the mean of its divisors is an integer number (206916759).

Almost surely, 2^551778022 is an apocalyptic number.

551778022 is a deficient number, since it is larger than the sum of its proper divisors (275889014).

551778022 is a wasteful number, since it uses less digits than its factorization.

551778022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275889013.

The product of its (nonzero) digits is 39200, while the sum is 37.

The square root of 551778022 is about 23489.9557683704. The cubic root of 551778022 is about 820.2032125744.

The spelling of 551778022 in words is "five hundred fifty-one million, seven hundred seventy-eight thousand, twenty-two".