551950620 has 144 divisors (see below), whose sum is σ = 1732116960. Its totient is φ = 131109888.

The previous prime is 551950561. The next prime is 551950667. The reversal of 551950620 is 26059155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 293122 + ... + 294998.

It is an arithmetic number, because the mean of its divisors is an integer number (12028590).

Almost surely, 2^551950620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551950620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (866058480).

551950620 is an abundant number, since it is smaller than the sum of its proper divisors (1180166340).

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

551950620 is a wasteful number, since it uses less digits than its factorization.

551950620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1929 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 551950620 is about 23493.6293492513. The cubic root of 551950620 is about 820.2887244229.

The spelling of 551950620 in words is "five hundred fifty-one million, nine hundred fifty thousand, six hundred twenty".