2239706799225 has 135 divisors (see below), whose sum is σ = 4827067828671. Its totient is φ = 1023650460000.

The previous prime is 2239706799203. The next prime is 2239706799227. The reversal of 2239706799225 is 5229976079322.

The square root of 2239706799225 is 1496565.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 806294447721 + 1433412351504 = 897939^2 + 1197252^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 2239706799225 - 2⁵ = 2239706799193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2239706799227) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 471415600 + ... + 471420350.

Almost surely, 2^{2239706799225} is an apocalyptic number.

2239706799225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2239706799225 is the 1496565-th square number.

2239706799225 is the 748283-rd centered octagonal number.

It is an amenable number.

2239706799225 is an abundant number, since it is smaller than the sum of its proper divisors (2587361029446).

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

2239706799225 is an frugal number, since it uses more digits than its factorization.

2239706799225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 63.

The spelling of 2239706799225 in words is "two trillion, two hundred thirty-nine billion, seven hundred six million, seven hundred ninety-nine thousand, two hundred twenty-five".