1031213140 has 96 divisors (see below), whose sum is σ = 2316625920. Its totient is φ = 384921600.

The previous prime is 1031213129. The next prime is 1031213153. The reversal of 1031213140 is 413121301.

1031213140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2872281 + ... + 2872639.

It is an arithmetic number, because the mean of its divisors is an integer number (24131520).

Almost surely, 2^1031213140 is an apocalyptic number.

1031213140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031213140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158312960).

1031213140 is an abundant number, since it is smaller than the sum of its proper divisors (1285412780).

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

1031213140 is a wasteful number, since it uses less digits than its factorization.

1031213140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1031213140 is about 32112.5075321128. The cubic root of 1031213140 is about 1010.2979678318.

Adding to 1031213140 its reverse (413121301), we get a palindrome (1444334441).

The spelling of 1031213140 in words is "one billion, thirty-one million, two hundred thirteen thousand, one hundred forty".