551423700 has 180 divisors, whose sum is σ = 1882101760. Its totient is φ = 139268160.

The previous prime is 551423699. The next prime is 551423707. The reversal of 551423700 is 7324155.

It is a happy number.

551423700 is a `hidden beast` number, since 551 + 42 + 3 + 70 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551423707) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 152109 + ... + 155691.

Almost surely, 2^551423700 is an apocalyptic number.

551423700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551423700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941050880).

551423700 is an abundant number, since it is smaller than the sum of its proper divisors (1330678060).

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

551423700 is a wasteful number, since it uses less digits than its factorization.

551423700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3628 (or 3612 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 551423700 is about 23482.4125677069. The cubic root of 551423700 is about 820.0276116025.

Adding to 551423700 its reverse (7324155), we get a palindrome (558747855).

The spelling of 551423700 in words is "five hundred fifty-one million, four hundred twenty-three thousand, seven hundred".