225121787 has 8 divisors (see below), whose sum is σ = 245858112. Its totient is φ = 204430600.

The previous prime is 225121777. The next prime is 225121789. The reversal of 225121787 is 787121522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225121787 - 2¹⁸ = 224859643 is a prime.

It is a super-3 number, since 3×225121787³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225121789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389 + ... + 21222.

It is an arithmetic number, because the mean of its divisors is an integer number (30732264).

Almost surely, 2^225121787 is an apocalyptic number.

225121787 is a deficient number, since it is larger than the sum of its proper divisors (20736325).

225121787 is a wasteful number, since it uses less digits than its factorization.

225121787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22569.

The product of its digits is 15680, while the sum is 35.

The square root of 225121787 is about 15004.0590174792. The cubic root of 225121787 is about 608.3299180059.

The spelling of 225121787 in words is "two hundred twenty-five million, one hundred twenty-one thousand, seven hundred eighty-seven".