2151931043 has 8 divisors (see below), whose sum is σ = 2334089520. Its totient is φ = 1975947520.

The previous prime is 2151931021. The next prime is 2151931057. The reversal of 2151931043 is 3401391512.

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

It is a cyclic number.

It is not a de Polignac number, because 2151931043 - 2¹⁸ = 2151668899 is a prime.

It is a super-3 number, since 3×2151931043³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2151930997 and 2151931015.

It is not an unprimeable number, because it can be changed into a prime (2151931073) 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 7 ways as a sum of consecutive naturals, for example, 1543013 + ... + 1544406.

It is an arithmetic number, because the mean of its divisors is an integer number (291761190).

Almost surely, 2^2151931043 is an apocalyptic number.

2151931043 is a deficient number, since it is larger than the sum of its proper divisors (182158477).

2151931043 is a wasteful number, since it uses less digits than its factorization.

2151931043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087477.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2151931043 is about 46388.9107761758. The cubic root of 2151931043 is about 1291.0491721042.

The spelling of 2151931043 in words is "two billion, one hundred fifty-one million, nine hundred thirty-one thousand, forty-three".