2991278151 has 6 divisors (see below), whose sum is σ = 4320735120. Its totient is φ = 1994185428.

The previous prime is 2991278131. The next prime is 2991278159. The reversal of 2991278151 is 1518721992.

It is not a de Polignac number, because 2991278151 - 2⁵ = 2991278119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2991278097 and 2991278106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2991278159) 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, 166182111 + ... + 166182128.

It is an arithmetic number, because the mean of its divisors is an integer number (720122520).

Almost surely, 2^2991278151 is an apocalyptic number.

2991278151 is a deficient number, since it is larger than the sum of its proper divisors (1329456969).

2991278151 is a wasteful number, since it uses less digits than its factorization.

2991278151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332364245 (or 332364242 counting only the distinct ones).

The product of its digits is 90720, while the sum is 45.

The square root of 2991278151 is about 54692.5785733311. The cubic root of 2991278151 is about 1440.8505377498.

The spelling of 2991278151 in words is "two billion, nine hundred ninety-one million, two hundred seventy-eight thousand, one hundred fifty-one".