551261268 has 96 divisors (see below), whose sum is σ = 1466640000. Its totient is φ = 178993152.

The previous prime is 551261267. The next prime is 551261279. The reversal of 551261268 is 862162155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551261267) 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 31 ways as a sum of consecutive naturals, for example, 1104483 + ... + 1104981.

It is an arithmetic number, because the mean of its divisors is an integer number (15277500).

Almost surely, 2^551261268 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 551261268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733320000).

551261268 is an abundant number, since it is smaller than the sum of its proper divisors (915378732).

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

551261268 is a wasteful number, since it uses less digits than its factorization.

551261268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758 (or 750 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 551261268 is about 23478.9537245594. The cubic root of 551261268 is about 819.9470856198.

The spelling of 551261268 in words is "five hundred fifty-one million, two hundred sixty-one thousand, two hundred sixty-eight".