1525424220 has 72 divisors (see below), whose sum is σ = 4630953600. Its totient is φ = 406442880.

The previous prime is 1525424209. The next prime is 1525424227. The reversal of 1525424220 is 224245251.

1525424220 is a `hidden beast` number, since 15 + 2 + 5 + 424 + 220 = 666.

It is a super-3 number, since 3×1525424220³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1525424227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276085 + ... + 281555.

It is an arithmetic number, because the mean of its divisors is an integer number (64318800).

Almost surely, 2^1525424220 is an apocalyptic number.

1525424220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1525424220 is an abundant number, since it is smaller than the sum of its proper divisors (3105529380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1525424220 is a wasteful number, since it uses less digits than its factorization.

1525424220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7035 (or 7030 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 1525424220 is about 39056.6795823711. The cubic root of 1525424220 is about 1151.1454799416.

Adding to 1525424220 its reverse (224245251), we get a palindrome (1749669471).

The spelling of 1525424220 in words is "one billion, five hundred twenty-five million, four hundred twenty-four thousand, two hundred twenty".