2156995245 has 8 divisors (see below), whose sum is σ = 3451192416. Its totient is φ = 1150397456.

The previous prime is 2156995237. The next prime is 2156995249. The reversal of 2156995245 is 5425996512.

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 2156995245 - 2³ = 2156995237 is a prime.

It is a super-2 number, since 2×2156995245² = 9305256973905220050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2156995194 and 2156995203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156995249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71899827 + ... + 71899856.

It is an arithmetic number, because the mean of its divisors is an integer number (431399052).

Almost surely, 2^2156995245 is an apocalyptic number.

It is an amenable number.

2156995245 is a deficient number, since it is larger than the sum of its proper divisors (1294197171).

2156995245 is a wasteful number, since it uses less digits than its factorization.

2156995245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143799691.

The product of its digits is 972000, while the sum is 48.

The square root of 2156995245 is about 46443.4628876874. The cubic root of 2156995245 is about 1292.0611332328.

The spelling of 2156995245 in words is "two billion, one hundred fifty-six million, nine hundred ninety-five thousand, two hundred forty-five".