281639048231025 has 27 divisors (see below), whose sum is σ = 504447279488971. Its totient is φ = 150207358133040.

The previous prime is 281639048230979. The next prime is 281639048231053. The reversal of 281639048231025 is 520132840936182.

The square root of 281639048231025 is 16782105.

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

281639048231025 is a `hidden beast` number, since 2 + 8 + 1 + 63 + 90 + 482 + 3 + 10 + 2 + 5 = 666.

It can be written as a sum of positive squares in only one way, i.e., 101390057363169 + 180248990867856 = 10069263^2 + 13425684^2 .

It is not a de Polignac number, because 281639048231025 - 2²¹ = 281639046133873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 251172172 + ... + 252290978.

Almost surely, 2^{281639048231025} is an apocalyptic number.

281639048231025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

281639048231025 is the 16782105-th square number.

281639048231025 is the 8391053-rd centered octagonal number.

It is an amenable number.

281639048231025 is a deficient number, since it is larger than the sum of its proper divisors (222808231257946).

281639048231025 is an frugal number, since it uses more digits than its factorization.

281639048231025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237630 (or 1118815 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 281639048231025 in words is "two hundred eighty-one trillion, six hundred thirty-nine billion, forty-eight million, two hundred thirty-one thousand, twenty-five".