1213354501542 has 24 divisors (see below), whose sum is σ = 2719587677040. Its totient is φ = 390504896880.

The previous prime is 1213354501511. The next prime is 1213354501547. The reversal of 1213354501542 is 2451054533121.

1213354501542 is a `hidden beast` number, since 1 + 2 + 13 + 3 + 54 + 50 + 1 + 542 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1213354501497 and 1213354501506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213354501547) 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, 1162216434 + ... + 1162217477.

It is an arithmetic number, because the mean of its divisors is an integer number (113316153210).

Almost surely, 2^{1213354501542} is an apocalyptic number.

1213354501542 is an abundant number, since it is smaller than the sum of its proper divisors (1506233175498).

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

1213354501542 is a wasteful number, since it uses less digits than its factorization.

1213354501542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2324433948 (or 2324433945 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 1213354501542 in words is "one trillion, two hundred thirteen billion, three hundred fifty-four million, five hundred one thousand, five hundred forty-two".