920212225 has 9 divisors (see below), whose sum is σ = 1141251267. Its totient is φ = 736048440.

The previous prime is 920212219. The next prime is 920212247. The reversal of 920212225 is 522212029.

The square root of 920212225 is 30335.

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., 331276401 + 588935824 = 18201^2 + 24268^2 .

It is not a de Polignac number, because 920212225 - 2¹¹ = 920210177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 920212225.

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, 148642 + ... + 154708.

Almost surely, 2^920212225 is an apocalyptic number.

920212225 is the 30335-th square number.

920212225 is the 15168-th centered octagonal number.

It is an amenable number.

920212225 is a deficient number, since it is larger than the sum of its proper divisors (221039042).

920212225 is an frugal number, since it uses more digits than its factorization.

920212225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12144 (or 6072 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The cubic root of 920212225 is about 972.6636058545.

Multiplying 920212225 by its sum of digits (25), we get a square (23005305625 = 151675²).

920212225 divided by its sum of digits (25) gives a square (36808489 = 6067²).

The spelling of 920212225 in words is "nine hundred twenty million, two hundred twelve thousand, two hundred twenty-five".