2151011142 has 48 divisors (see below), whose sum is σ = 5509988640. Its totient is φ = 593381376.

The previous prime is 2151011141. The next prime is 2151011143. The reversal of 2151011142 is 2411101512.

2151011142 is a `hidden beast` number, since 2 + 1 + 510 + 11 + 142 = 666.

It is an interprime number because it is at equal distance from previous prime (2151011141) and next prime (2151011143).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151011141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 290683 + ... + 297990.

It is an arithmetic number, because the mean of its divisors is an integer number (114791430).

Almost surely, 2^2151011142 is an apocalyptic number.

2151011142 is an abundant number, since it is smaller than the sum of its proper divisors (3358977498).

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

2151011142 is a wasteful number, since it uses less digits than its factorization.

2151011142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588717 (or 588714 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 2151011142 is about 46378.9946204098. The cubic root of 2151011142 is about 1290.8651812807.

Adding to 2151011142 its reverse (2411101512), we get a palindrome (4562112654).

The spelling of 2151011142 in words is "two billion, one hundred fifty-one million, eleven thousand, one hundred forty-two".