551235450 has 48 divisors (see below), whose sum is σ = 1373171040. Its totient is φ = 146339520.

The previous prime is 551235427. The next prime is 551235463. The reversal of 551235450 is 54532155.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25956 + ... + 42144.

It is an arithmetic number, because the mean of its divisors is an integer number (28607730).

Almost surely, 2^551235450 is an apocalyptic number.

551235450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 551235450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686585520).

551235450 is an abundant number, since it is smaller than the sum of its proper divisors (821935590).

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

551235450 is a wasteful number, since it uses less digits than its factorization.

551235450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16431 (or 16426 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 551235450 is about 23478.4039065691. The cubic root of 551235450 is about 819.9342848388.

The spelling of 551235450 in words is "five hundred fifty-one million, two hundred thirty-five thousand, four hundred fifty".