2151442042000 has 40 divisors (see below), whose sum is σ = 5202186862392. Its totient is φ = 860576816000.

The previous prime is 2151442041953. The next prime is 2151442042003. The reversal of 2151442042000 is 2402441512.

It can be written as a sum of positive squares in 4 ways, for example, as 73081552896 + 2078360489104 = 270336^2 + 1441652^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 (2151442042003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537858511 + ... + 537862510.

Almost surely, 2^{2151442042000} is an apocalyptic number.

2151442042000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151442042000 is an abundant number, since it is smaller than the sum of its proper divisors (3050744820392).

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

2151442042000 is a wasteful number, since it uses less digits than its factorization.

2151442042000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075721044 (or 1075721028 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 2151442042000 its reverse (2402441512), we get a palindrome (2153844483512).

The spelling of 2151442042000 in words is "two trillion, one hundred fifty-one billion, four hundred forty-two million, forty-two thousand".