2118951 has 6 divisors (see below), whose sum is σ = 3060720. Its totient is φ = 1412628.

The previous prime is 2118923. The next prime is 2118959. The reversal of 2118951 is 1598112.

It is not a de Polignac number, because 2118951 - 2¹¹ = 2116903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118959) 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, 117711 + ... + 117728.

It is an arithmetic number, because the mean of its divisors is an integer number (510120).

2^2118951 is an apocalyptic number.

2118951 is a deficient number, since it is larger than the sum of its proper divisors (941769).

2118951 is a wasteful number, since it uses less digits than its factorization.

2118951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235445 (or 235442 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2118951 is about 1455.6617052049. The cubic root of 2118951 is about 128.4419739326.

The spelling of 2118951 in words is "two million, one hundred eighteen thousand, nine hundred fifty-one".