551211414420 has 48 divisors (see below), whose sum is σ = 1543702281408. Its totient is φ = 146960156160.

The previous prime is 551211414329. The next prime is 551211414449. The reversal of 551211414420 is 24414112155.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621861 + ... + 1220300.

It is an arithmetic number, because the mean of its divisors is an integer number (32160464196).

Almost surely, 2^551211414420 is an apocalyptic number.

It is an amenable number.

551211414420 is an abundant number, since it is smaller than the sum of its proper divisors (992490866988).

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

551211414420 is a wasteful number, since it uses less digits than its factorization.

551211414420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847160 (or 1847158 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

Adding to 551211414420 its reverse (24414112155), we get a palindrome (575625526575).

The spelling of 551211414420 in words is "five hundred fifty-one billion, two hundred eleven million, four hundred fourteen thousand, four hundred twenty".