2151566142 has 32 divisors (see below), whose sum is σ = 4898430720. Its totient is φ = 623641920.

The previous prime is 2151566117. The next prime is 2151566159. The reversal of 2151566142 is 2416651512.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 707167 + ... + 710202.

It is an arithmetic number, because the mean of its divisors is an integer number (153075960).

Almost surely, 2^2151566142 is an apocalyptic number.

2151566142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2151566142 is an abundant number, since it is smaller than the sum of its proper divisors (2746864578).

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

2151566142 is a wasteful number, since it uses less digits than its factorization.

2151566142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1417408.

The product of its digits is 14400, while the sum is 33.

The square root of 2151566142 is about 46384.9775466152. The cubic root of 2151566142 is about 1290.9761939657.

The spelling of 2151566142 in words is "two billion, one hundred fifty-one million, five hundred sixty-six thousand, one hundred forty-two".