2231078 has 4 divisors (see below), whose sum is σ = 3346620. Its totient is φ = 1115538.

The previous prime is 2231077. The next prime is 2231087. The reversal of 2231078 is 8701322.

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

It is a super-3 number, since 3×2231078³ = 33316971402584059656, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557768 + ... + 557771.

It is an arithmetic number, because the mean of its divisors is an integer number (836655).

2^2231078 is an apocalyptic number.

2231078 is a deficient number, since it is larger than the sum of its proper divisors (1115542).

2231078 is a wasteful number, since it uses less digits than its factorization.

2231078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115541.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2231078 is about 1493.6793497937. The cubic root of 2231078 is about 130.6687042697.

The spelling of 2231078 in words is "two million, two hundred thirty-one thousand, seventy-eight".