2151223143 has 8 divisors (see below), whose sum is σ = 2993006208. Its totient is φ = 1371794424.

The previous prime is 2151223127. The next prime is 2151223159. The reversal of 2151223143 is 3413221512.

It is an interprime number because it is at equal distance from previous prime (2151223127) and next prime (2151223159).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2151223143 - 2⁴ = 2151223127 is a prime.

It is a super-2 number, since 2×2151223143² = 9255522021957596898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151223343) 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, 15588505 + ... + 15588642.

It is an arithmetic number, because the mean of its divisors is an integer number (374125776).

Almost surely, 2^2151223143 is an apocalyptic number.

2151223143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2151223143 is a deficient number, since it is larger than the sum of its proper divisors (841783065).

2151223143 is a wasteful number, since it uses less digits than its factorization.

2151223143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31177173.

The product of its digits is 1440, while the sum is 24.

The square root of 2151223143 is about 46381.2800922959. The cubic root of 2151223143 is about 1290.9075885799.

Adding to 2151223143 its reverse (3413221512), we get a palindrome (5564444655).

The spelling of 2151223143 in words is "two billion, one hundred fifty-one million, two hundred twenty-three thousand, one hundred forty-three".