394222525 has 12 divisors (see below), whose sum is σ = 491542324. Its totient is φ = 313632000.

The previous prime is 394222523. The next prime is 394222529. The reversal of 394222525 is 525222493.

It can be written as a sum of positive squares in 6 ways, for example, as 33108516 + 361114009 = 5754^2 + 19003^2 .

It is not a de Polignac number, because 394222525 - 2¹ = 394222523 is a prime.

It is a super-2 number, since 2×394222525² = 310822798434751250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394222523) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39036 + ... + 48085.

Almost surely, 2^394222525 is an apocalyptic number.

It is an amenable number.

394222525 is a deficient number, since it is larger than the sum of its proper divisors (97319799).

394222525 is a wasteful number, since it uses less digits than its factorization.

394222525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87312 (or 87307 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 394222525 is about 19855.0377738246. The cubic root of 394222525 is about 733.2416821870.

The spelling of 394222525 in words is "three hundred ninety-four million, two hundred twenty-two thousand, five hundred twenty-five".