2549021206 has 4 divisors (see below), whose sum is σ = 3823531812. Its totient is φ = 1274510602.

The previous prime is 2549021203. The next prime is 2549021219. The reversal of 2549021206 is 6021209452.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549021203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637255300 + ... + 637255303.

It is an arithmetic number, because the mean of its divisors is an integer number (955882953).

Almost surely, 2^2549021206 is an apocalyptic number.

2549021206 is a deficient number, since it is larger than the sum of its proper divisors (1274510606).

2549021206 is a wasteful number, since it uses less digits than its factorization.

2549021206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274510605.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2549021206 is about 50487.8322568914. The cubic root of 2549021206 is about 1366.0223849413.

The spelling of 2549021206 in words is "two billion, five hundred forty-nine million, twenty-one thousand, two hundred six".