1031225820 has 48 divisors (see below), whose sum is σ = 2890960800. Its totient is φ = 274657536.

The previous prime is 1031225791. The next prime is 1031225837. The reversal of 1031225820 is 285221301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41106 + ... + 61254.

It is an arithmetic number, because the mean of its divisors is an integer number (60228350).

Almost surely, 2^1031225820 is an apocalyptic number.

1031225820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031225820 is an abundant number, since it is smaller than the sum of its proper divisors (1859734980).

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

1031225820 is a wasteful number, since it uses less digits than its factorization.

1031225820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21014 (or 21012 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1031225820 is about 32112.7049623665. The cubic root of 1031225820 is about 1010.3021087558.

The spelling of 1031225820 in words is "one billion, thirty-one million, two hundred twenty-five thousand, eight hundred twenty".