1031220450 has 192 divisors, whose sum is σ = 3109384320. Its totient is φ = 249765120.

The previous prime is 1031220439. The next prime is 1031220481. The reversal of 1031220450 is 540221301.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1175412 + ... + 1176288.

It is an arithmetic number, because the mean of its divisors is an integer number (16194710).

Almost surely, 2^1031220450 is an apocalyptic number.

1031220450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031220450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1554692160).

1031220450 is an abundant number, since it is smaller than the sum of its proper divisors (2078163870).

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

1031220450 is a wasteful number, since it uses less digits than its factorization.

1031220450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1031220450 is about 32112.6213504908. The cubic root of 1031220450 is about 1010.3003550721.

Adding to 1031220450 its reverse (540221301), we get a palindrome (1571441751).

The spelling of 1031220450 in words is "one billion, thirty-one million, two hundred twenty thousand, four hundred fifty".