2151122854 has 4 divisors (see below), whose sum is σ = 3226684284. Its totient is φ = 1075561426.

The previous prime is 2151122839. The next prime is 2151122887. The reversal of 2151122854 is 4582211512.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×2151122854² = 9254659066002210632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537780712 + ... + 537780715.

It is an arithmetic number, because the mean of its divisors is an integer number (806671071).

Almost surely, 2^2151122854 is an apocalyptic number.

2151122854 is a deficient number, since it is larger than the sum of its proper divisors (1075561430).

2151122854 is a wasteful number, since it uses less digits than its factorization.

2151122854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075561429.

The product of its digits is 6400, while the sum is 31.

The square root of 2151122854 is about 46380.1989430835. The cubic root of 2151122854 is about 1290.8875277689.

The spelling of 2151122854 in words is "two billion, one hundred fifty-one million, one hundred twenty-two thousand, eight hundred fifty-four".