2131351807225 has 9 divisors (see below), whose sum is σ = 2642885292463. Its totient is φ = 1705075606120.

The previous prime is 2131351807219. The next prime is 2131351807231. The reversal of 2131351807225 is 5227081531312.

The square root of 2131351807225 is 1459915.

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

It is an interprime number because it is at equal distance from previous prime (2131351807219) and next prime (2131351807231).

It can be written as a sum of positive squares in only one way, i.e., 767286650601 + 1364065156624 = 875949^2 + 1167932^2 .

It is not a de Polignac number, because 2131351807225 - 2²¹ = 2131349710073 is a prime.

It is a super-2 number, since 2×2131351807225² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7153584 + ... + 7445566.

Almost surely, 2^{2131351807225} is an apocalyptic number.

2131351807225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2131351807225 is the 1459915-th square number.

2131351807225 is the 729958-th centered octagonal number.

It is an amenable number.

2131351807225 is a deficient number, since it is larger than the sum of its proper divisors (511533485238).

2131351807225 is an frugal number, since it uses more digits than its factorization.

2131351807225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583976 (or 291988 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 2131351807225 in words is "two trillion, one hundred thirty-one billion, three hundred fifty-one million, eight hundred seven thousand, two hundred twenty-five".