1231534554054 has 48 divisors (see below), whose sum is σ = 3033744195888. Its totient is φ = 331168954368.

The previous prime is 1231534554043. The next prime is 1231534554059. The reversal of 1231534554054 is 4504554351321.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1231534553997 and 1231534554015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231534554059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123197739 + ... + 123207734.

It is an arithmetic number, because the mean of its divisors is an integer number (63203004081).

Almost surely, 2^{1231534554054} is an apocalyptic number.

1231534554054 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1231534554054 is an abundant number, since it is smaller than the sum of its proper divisors (1802209641834).

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

1231534554054 is a wasteful number, since it uses less digits than its factorization.

1231534554054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246405509 (or 246405502 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 1231534554054 in words is "one trillion, two hundred thirty-one billion, five hundred thirty-four million, five hundred fifty-four thousand, fifty-four".