1525212330 has 16 divisors (see below), whose sum is σ = 3660509664. Its totient is φ = 406723280.

The previous prime is 1525212329. The next prime is 1525212331. The reversal of 1525212330 is 332125251.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1525212329) and next prime (1525212331).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1525212330.

It is not an unprimeable number, because it can be changed into a prime (1525212331) 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, 25420176 + ... + 25420235.

It is an arithmetic number, because the mean of its divisors is an integer number (228781854).

Almost surely, 2^1525212330 is an apocalyptic number.

1525212330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1525212330 is an abundant number, since it is smaller than the sum of its proper divisors (2135297334).

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

1525212330 is a wasteful number, since it uses less digits than its factorization.

1525212330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50840421.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1525212330 is about 39053.9668919817. The cubic root of 1525212330 is about 1151.0921772805.

Adding to 1525212330 its reverse (332125251), we get a palindrome (1857337581).

The spelling of 1525212330 in words is "one billion, five hundred twenty-five million, two hundred twelve thousand, three hundred thirty".