2251658 has 8 divisors (see below), whose sum is σ = 3420480. Its totient is φ = 1111500.

The previous prime is 2251649. The next prime is 2251673. The reversal of 2251658 is 8561522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2251658.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6968 + ... + 7283.

It is an arithmetic number, because the mean of its divisors is an integer number (427560).

2^2251658 is an apocalyptic number.

2251658 is a deficient number, since it is larger than the sum of its proper divisors (1168822).

2251658 is a wasteful number, since it uses less digits than its factorization.

2251658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14332.

The product of its digits is 4800, while the sum is 29.

The square root of 2251658 is about 1500.5525648907. The cubic root of 2251658 is about 131.0692483946.

The spelling of 2251658 in words is "two million, two hundred fifty-one thousand, six hundred fifty-eight".