1015223451220 has 48 divisors (see below), whose sum is σ = 2335941014400. Its totient is φ = 367560040320.

The previous prime is 1015223451169. The next prime is 1015223451257. The reversal of 1015223451220 is 221543225101.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10025280 + ... + 10126039.

It is an arithmetic number, because the mean of its divisors is an integer number (48665437800).

Almost surely, 2^{1015223451220} is an apocalyptic number.

1015223451220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1015223451220 is an abundant number, since it is smaller than the sum of its proper divisors (1320717563180).

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

1015223451220 is a wasteful number, since it uses less digits than its factorization.

1015223451220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20151568 (or 20151566 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1015223451220 its reverse (221543225101), we get a palindrome (1236766676321).

The spelling of 1015223451220 in words is "one trillion, fifteen billion, two hundred twenty-three million, four hundred fifty-one thousand, two hundred twenty".