55421103154020 has 24 divisors (see below), whose sum is σ = 155179088831424. Its totient is φ = 14778960841056.

The previous prime is 55421103153991. The next prime is 55421103154049. The reversal of 55421103154020 is 2045130112455.

It is an interprime number because it is at equal distance from previous prime (55421103153991) and next prime (55421103154049).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461842526224 + ... + 461842526343.

It is an arithmetic number, because the mean of its divisors is an integer number (6465795367976).

Almost surely, 2^{55421103154020} is an apocalyptic number.

It is an amenable number.

55421103154020 is an abundant number, since it is smaller than the sum of its proper divisors (99757985677404).

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

55421103154020 is a wasteful number, since it uses less digits than its factorization.

55421103154020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923685052579 (or 923685052577 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 55421103154020 its reverse (2045130112455), we get a palindrome (57466233266475).

The spelling of 55421103154020 in words is "fifty-five trillion, four hundred twenty-one billion, one hundred three million, one hundred fifty-four thousand, twenty".