210731493025 has 9 divisors (see below), whose sum is σ = 261309897523. Its totient is φ = 168583358200.

The previous prime is 210731493023. The next prime is 210731493041. The reversal of 210731493025 is 520394137012.

The square root of 210731493025 is 459055.

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., 75863337489 + 134868155536 = 275433^2 + 367244^2 .

It is not a de Polignac number, because 210731493025 - 2¹ = 210731493023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210731493023) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2249370 + ... + 2341180.

Almost surely, 2^210731493025 is an apocalyptic number.

210731493025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

210731493025 is the 459055-th square number.

210731493025 is the 229528-th centered octagonal number.

It is an amenable number.

210731493025 is a deficient number, since it is larger than the sum of its proper divisors (50578404498).

210731493025 is an frugal number, since it uses more digits than its factorization.

210731493025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183632 (or 91816 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 210731493025 in words is "two hundred ten billion, seven hundred thirty-one million, four hundred ninety-three thousand, twenty-five".