551211510400 has 96 divisors (see below), whose sum is σ = 1380843629280. Its totient is φ = 217379097600.

The previous prime is 551211510391. The next prime is 551211510403. The reversal of 551211510400 is 4015112155.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (551211510403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 985854 + ... + 1440253.

It is an arithmetic number, because the mean of its divisors is an integer number (14383787805).

Almost surely, 2^551211510400 is an apocalyptic number.

551211510400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551211510400 is an abundant number, since it is smaller than the sum of its proper divisors (829632118880).

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

551211510400 is a wasteful number, since it uses less digits than its factorization.

551211510400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426202 (or 2426185 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 25.

Adding to 551211510400 its reverse (4015112155), we get a palindrome (555226622555).

The spelling of 551211510400 in words is "five hundred fifty-one billion, two hundred eleven million, five hundred ten thousand, four hundred".