266223142 has 4 divisors (see below), whose sum is σ = 399334716. Its totient is φ = 133111570.

The previous prime is 266223109. The next prime is 266223149. The reversal of 266223142 is 241322662.

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

It is a super-2 number, since 2×266223142² = 141749522672704328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266223142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266223149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66555784 + ... + 66555787.

It is an arithmetic number, because the mean of its divisors is an integer number (99833679).

Almost surely, 2^266223142 is an apocalyptic number.

266223142 is a deficient number, since it is larger than the sum of its proper divisors (133111574).

266223142 is a wasteful number, since it uses less digits than its factorization.

266223142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133111573.

The product of its digits is 6912, while the sum is 28.

The square root of 266223142 is about 16316.3458531621. The cubic root of 266223142 is about 643.3025430839.

The spelling of 266223142 in words is "two hundred sixty-six million, two hundred twenty-three thousand, one hundred forty-two".