2151102861 has 6 divisors (see below), whose sum is σ = 3107148590. Its totient is φ = 1434068568.

The previous prime is 2151102859. The next prime is 2151102883. The reversal of 2151102861 is 1682011512.

It can be written as a sum of positive squares in only one way, i.e., 1912400361 + 238702500 = 43731^2 + 15450^2 .

It is not a de Polignac number, because 2151102861 - 2¹ = 2151102859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151102851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119505706 + ... + 119505723.

Almost surely, 2^2151102861 is an apocalyptic number.

It is an amenable number.

2151102861 is a deficient number, since it is larger than the sum of its proper divisors (956045729).

2151102861 is a wasteful number, since it uses less digits than its factorization.

2151102861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239011435 (or 239011432 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 27.

The square root of 2151102861 is about 46379.9834087939. The cubic root of 2151102861 is about 1290.8835284940.

The spelling of 2151102861 in words is "two billion, one hundred fifty-one million, one hundred two thousand, eight hundred sixty-one".