1013155550 has 24 divisors (see below), whose sum is σ = 2055785832. Its totient is φ = 368420000.

The previous prime is 1013155523. The next prime is 1013155597. The reversal of 1013155550 is 555513101.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 920501 + ... + 921600.

It is an arithmetic number, because the mean of its divisors is an integer number (85657743).

Almost surely, 2^1013155550 is an apocalyptic number.

1013155550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1013155550 is an abundant number, since it is smaller than the sum of its proper divisors (1042630282).

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

1013155550 is a wasteful number, since it uses less digits than its factorization.

1013155550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842124 (or 1842119 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 1013155550 is about 31830.1044610287. The cubic root of 1013155550 is about 1004.3660928235.

Adding to 1013155550 its reverse (555513101), we get a palindrome (1568668651).

The spelling of 1013155550 in words is "one billion, thirteen million, one hundred fifty-five thousand, five hundred fifty".