1011533250 has 128 divisors (see below), whose sum is σ = 3107639808. Its totient is φ = 213408000.

The previous prime is 1011533221. The next prime is 1011533273. The reversal of 1011533250 is 523351101.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 60840 + ... + 75660.

It is an arithmetic number, because the mean of its divisors is an integer number (24278436).

Almost surely, 2^1011533250 is an apocalyptic number.

1011533250 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 1011533250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1553819904).

1011533250 is an abundant number, since it is smaller than the sum of its proper divisors (2096106558).

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

1011533250 is a wasteful number, since it uses less digits than its factorization.

1011533250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14861 (or 14851 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 1011533250 is about 31804.6105148294. The cubic root of 1011533250 is about 1003.8297311030.

Adding to 1011533250 its reverse (523351101), we get a palindrome (1534884351).

It can be divided in two parts, 10115 and 33250, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 1011533250 in words is "one billion, eleven million, five hundred thirty-three thousand, two hundred fifty".