1013431220 has 12 divisors (see below), whose sum is σ = 2128205604. Its totient is φ = 405372480.

The previous prime is 1013431169. The next prime is 1013431229. The reversal of 1013431220 is 221343101.

It can be written as a sum of positive squares in 2 ways, for example, as 291111844 + 722319376 = 17062^2 + 26876^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013431229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25335761 + ... + 25335800.

It is an arithmetic number, because the mean of its divisors is an integer number (177350467).

Almost surely, 2^1013431220 is an apocalyptic number.

1013431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1013431220 is an abundant number, since it is smaller than the sum of its proper divisors (1114774384).

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

1013431220 is a wasteful number, since it uses less digits than its factorization.

1013431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50671570 (or 50671568 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1013431220 is about 31834.4345010242. The cubic root of 1013431220 is about 1004.4571773870.

Adding to 1013431220 its reverse (221343101), we get a palindrome (1234774321).

The spelling of 1013431220 in words is "one billion, thirteen million, four hundred thirty-one thousand, two hundred twenty".