2143157871465 has 36 divisors (see below), whose sum is σ = 4000627456644. Its totient is φ = 1055075674176.

The previous prime is 2143157871461. The next prime is 2143157871469. The reversal of 2143157871465 is 5641787513412.

2143157871465 is a `hidden beast` number, since 2 + 1 + 4 + 3 + 1 + 578 + 7 + 1 + 4 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (2143157871461) and next prime (2143157871469).

It can be written as a sum of positive squares in 2 ways, for example, as 527546552976 + 1615611318489 = 726324^2 + 1271067^2 .

It is not a de Polignac number, because 2143157871465 - 2² = 2143157871461 is a prime.

It is a super-2 number, since 2×2143157871465² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143157871461) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35378032 + ... + 35438558.

Almost surely, 2^{2143157871465} is an apocalyptic number.

It is an amenable number.

2143157871465 is a deficient number, since it is larger than the sum of its proper divisors (1857469585179).

2143157871465 is an frugal number, since it uses more digits than its factorization.

2143157871465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121078 (or 60548 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 54.

The spelling of 2143157871465 in words is "two trillion, one hundred forty-three billion, one hundred fifty-seven million, eight hundred seventy-one thousand, four hundred sixty-five".