1031655540 has 96 divisors (see below), whose sum is σ = 3219592320. Its totient is φ = 245293056.

The previous prime is 1031655539. The next prime is 1031655577. The reversal of 1031655540 is 455561301.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1031655498 and 1031655507.

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, 7237 + ... + 45996.

It is an arithmetic number, because the mean of its divisors is an integer number (33537420).

Almost surely, 2^1031655540 is an apocalyptic number.

1031655540 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 1031655540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609796160).

1031655540 is an abundant number, since it is smaller than the sum of its proper divisors (2187936780).

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

1031655540 is a wasteful number, since it uses less digits than its factorization.

1031655540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53281 (or 53279 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 1031655540 is about 32119.3950752501. The cubic root of 1031655540 is about 1010.4424229086.

It can be divided in two parts, 10316 and 55540, that added together give a palindrome (65856).

The spelling of 1031655540 in words is "one billion, thirty-one million, six hundred fifty-five thousand, five hundred forty".