551342140 has 24 divisors (see below), whose sum is σ = 1162928592. Its totient is φ = 219563520.

The previous prime is 551342137. The next prime is 551342149. The reversal of 551342140 is 41243155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551342149) 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 7 ways as a sum of consecutive naturals, for example, 56181 + ... + 65260.

It is an arithmetic number, because the mean of its divisors is an integer number (48455358).

Almost surely, 2^551342140 is an apocalyptic number.

It is an amenable number.

551342140 is an abundant number, since it is smaller than the sum of its proper divisors (611586452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551342140 is a wasteful number, since it uses less digits than its factorization.

551342140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121677 (or 121675 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 551342140 is about 23480.6758846503. The cubic root of 551342140 is about 819.9871800494.

Adding to 551342140 its reverse (41243155), we get a palindrome (592585295).

The spelling of 551342140 in words is "five hundred fifty-one million, three hundred forty-two thousand, one hundred forty".