2509772220 has 72 divisors (see below), whose sum is σ = 8060807664. Its totient is φ = 629902848.

The previous prime is 2509772173. The next prime is 2509772233. The reversal of 2509772220 is 222779052.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407034 + ... + 413153.

It is an arithmetic number, because the mean of its divisors is an integer number (111955662).

Almost surely, 2^2509772220 is an apocalyptic number.

2509772220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2509772220 is an abundant number, since it is smaller than the sum of its proper divisors (5551035444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2509772220 is a wasteful number, since it uses less digits than its factorization.

2509772220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820219 (or 820214 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 2509772220 is about 50097.6268899037. The cubic root of 2509772220 is about 1358.9749015469.

The spelling of 2509772220 in words is "two billion, five hundred nine million, seven hundred seventy-two thousand, two hundred twenty".