1225806231 has 32 divisors (see below), whose sum is σ = 1788853248. Its totient is φ = 742135680.

The previous prime is 1225806221. The next prime is 1225806269. The reversal of 1225806231 is 1326085221.

It is not a de Polignac number, because 1225806231 - 2¹⁵ = 1225773463 is a prime.

It is a super-3 number, since 3×1225806231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225806221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654226 + ... + 656096.

It is an arithmetic number, because the mean of its divisors is an integer number (55901664).

Almost surely, 2^1225806231 is an apocalyptic number.

1225806231 is a deficient number, since it is larger than the sum of its proper divisors (563047017).

1225806231 is a wasteful number, since it uses less digits than its factorization.

1225806231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1225806231 is about 35011.5156912694. The cubic root of 1225806231 is about 1070.2221657062. Note that the first 3 decimals are identical.

The spelling of 1225806231 in words is "one billion, two hundred twenty-five million, eight hundred six thousand, two hundred thirty-one".