15430111220 has 12 divisors (see below), whose sum is σ = 32403233604. Its totient is φ = 6172044480.

The previous prime is 15430111199. The next prime is 15430111243. The reversal of 15430111220 is 2211103451.

It can be written as a sum of positive squares in 2 ways, for example, as 1571171044 + 13858940176 = 39638^2 + 117724^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 771505561 = 15430111220 / (1 + 5 + 4 + 3 + 0 + 1 + 1 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 15430111192 and 15430111201.

It is a congruent number.

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, 385752761 + ... + 385752800.

It is an arithmetic number, because the mean of its divisors is an integer number (2700269467).

Almost surely, 2^15430111220 is an apocalyptic number.

15430111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15430111220 is an abundant number, since it is smaller than the sum of its proper divisors (16973122384).

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

15430111220 is a wasteful number, since it uses less digits than its factorization.

15430111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771505570 (or 771505568 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 15430111220 its reverse (2211103451), we get a palindrome (17641214671).

The spelling of 15430111220 in words is "fifteen billion, four hundred thirty million, one hundred eleven thousand, two hundred twenty".