2157512669 has 8 divisors (see below), whose sum is σ = 2323978272. Its totient is φ = 1991118960.

The previous prime is 2157512639. The next prime is 2157512671. The reversal of 2157512669 is 9662157512.

It is a happy number.

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 2157512669 - 2¹⁶ = 2157447133 is a prime.

It is a super-2 number, since 2×2157512669² = 9309721833791007122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157512639) 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, 55514 + ... + 86004.

It is an arithmetic number, because the mean of its divisors is an integer number (290497284).

Almost surely, 2^2157512669 is an apocalyptic number.

It is an amenable number.

2157512669 is a deficient number, since it is larger than the sum of its proper divisors (166465603).

2157512669 is a wasteful number, since it uses less digits than its factorization.

2157512669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35947.

The product of its digits is 226800, while the sum is 44.

The square root of 2157512669 is about 46449.0330254571. The cubic root of 2157512669 is about 1292.1644389759.

The spelling of 2157512669 in words is "two billion, one hundred fifty-seven million, five hundred twelve thousand, six hundred sixty-nine".