1525220512 has 24 divisors (see below), whose sum is σ = 3083936436. Its totient is φ = 741998592.

The previous prime is 1525220443. The next prime is 1525220537. The reversal of 1525220512 is 2150225251.

It can be written as a sum of positive squares in 2 ways, for example, as 1489651216 + 35569296 = 38596^2 + 5964^2 .

It is a super-2 number, since 2×1525220512² = 4652595220451084288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642913 + ... + 645280.

Almost surely, 2^1525220512 is an apocalyptic number.

It is an amenable number.

1525220512 is an abundant number, since it is smaller than the sum of its proper divisors (1558715924).

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

1525220512 is a wasteful number, since it uses less digits than its factorization.

1525220512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288240 (or 1288232 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1525220512 is about 39054.0716443241. The cubic root of 1525220512 is about 1151.0942356211.

Adding to 1525220512 its reverse (2150225251), we get a palindrome (3675445763).

The spelling of 1525220512 in words is "one billion, five hundred twenty-five million, two hundred twenty thousand, five hundred twelve".