2137812456 has 32 divisors (see below), whose sum is σ = 5755649760. Its totient is φ = 657788352.

The previous prime is 2137812451. The next prime is 2137812461. The reversal of 2137812456 is 6542187312.

It is an interprime number because it is at equal distance from previous prime (2137812451) and next prime (2137812461).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2137812451) 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, 3425670 + ... + 3426293.

It is an arithmetic number, because the mean of its divisors is an integer number (179864055).

Almost surely, 2^2137812456 is an apocalyptic number.

2137812456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

2137812456 is an abundant number, since it is smaller than the sum of its proper divisors (3617837304).

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

2137812456 is a wasteful number, since it uses less digits than its factorization.

2137812456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6851985 (or 6851981 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 2137812456 is about 46236.4840358780. The cubic root of 2137812456 is about 1288.2194966249.

Adding to 2137812456 its reverse (6542187312), we get a palindrome (8679999768).

The spelling of 2137812456 in words is "two billion, one hundred thirty-seven million, eight hundred twelve thousand, four hundred fifty-six".