1011213550 has 48 divisors (see below), whose sum is σ = 2014022880. Its totient is φ = 376386560.

The previous prime is 1011213527. The next prime is 1011213551. The reversal of 1011213550 is 553121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011213551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68967 + ... + 82333.

It is an arithmetic number, because the mean of its divisors is an integer number (41958810).

Almost surely, 2^1011213550 is an apocalyptic number.

1011213550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1011213550 is a deficient number, since it is larger than the sum of its proper divisors (1002809330).

1011213550 is a wasteful number, since it uses less digits than its factorization.

1011213550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13485 (or 13480 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1011213550 is about 31799.5841167774. The cubic root of 1011213550 is about 1003.7239648711.

Adding to 1011213550 its reverse (553121101), we get a palindrome (1564334651).

The spelling of 1011213550 in words is "one billion, eleven million, two hundred thirteen thousand, five hundred fifty".