2145896731 has 8 divisors (see below), whose sum is σ = 2421702000. Its totient is φ = 1883545440.

The previous prime is 2145896717. The next prime is 2145896743. The reversal of 2145896731 is 1376985412.

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 2145896731 - 2¹⁵ = 2145863963 is a prime.

It is a super-2 number, since 2×2145896731² = 9209745560232972722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145894731) 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, 3363156 + ... + 3363793.

It is an arithmetic number, because the mean of its divisors is an integer number (302712750).

Almost surely, 2^2145896731 is an apocalyptic number.

2145896731 is a deficient number, since it is larger than the sum of its proper divisors (275805269).

2145896731 is a wasteful number, since it uses less digits than its factorization.

2145896731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6726989.

The product of its digits is 362880, while the sum is 46.

The square root of 2145896731 is about 46323.8246585923. The cubic root of 2145896731 is about 1289.8412822774.

The spelling of 2145896731 in words is "two billion, one hundred forty-five million, eight hundred ninety-six thousand, seven hundred thirty-one".