2161640151 has 48 divisors (see below), whose sum is σ = 3628654848. Its totient is φ = 1225478400.

The previous prime is 2161640141. The next prime is 2161640161. The reversal of 2161640151 is 1510461612.

2161640151 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 640 + 15 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (2161640141) and next prime (2161640161).

It is not a de Polignac number, because 2161640151 - 2¹¹ = 2161638103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161640141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277216 + ... + 284906.

It is an arithmetic number, because the mean of its divisors is an integer number (75596976).

Almost surely, 2^2161640151 is an apocalyptic number.

2161640151 is a deficient number, since it is larger than the sum of its proper divisors (1467014697).

2161640151 is a wasteful number, since it uses less digits than its factorization.

2161640151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892 (or 7889 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2161640151 is about 46493.4420214292. The cubic root of 2161640151 is about 1292.9879162599.

The spelling of 2161640151 in words is "two billion, one hundred sixty-one million, six hundred forty thousand, one hundred fifty-one".