15251212420 has 48 divisors (see below), whose sum is σ = 32371859520. Its totient is φ = 6035078016.

The previous prime is 15251212411. The next prime is 15251212421. The reversal of 15251212420 is 2421215251.

It is not an unprimeable number, because it can be changed into a prime (15251212421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1483819 + ... + 1494061.

It is an arithmetic number, because the mean of its divisors is an integer number (674413740).

Almost surely, 2^15251212420 is an apocalyptic number.

15251212420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15251212420 is an abundant number, since it is smaller than the sum of its proper divisors (17120647100).

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

15251212420 is a wasteful number, since it uses less digits than its factorization.

15251212420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044 (or 11042 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 15251212420 its reverse (2421215251), we get a palindrome (17672427671).

The spelling of 15251212420 in words is "fifteen billion, two hundred fifty-one million, two hundred twelve thousand, four hundred twenty".