1020001550 has 12 divisors (see below), whose sum is σ = 1897202976. Its totient is φ = 408000600.

The previous prime is 1020001531. The next prime is 1020001553. The reversal of 1020001550 is 551000201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020001553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10199966 + ... + 10200065.

It is an arithmetic number, because the mean of its divisors is an integer number (158100248).

Almost surely, 2^1020001550 is an apocalyptic number.

1020001550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020001550 is a deficient number, since it is larger than the sum of its proper divisors (877201426).

1020001550 is a wasteful number, since it uses less digits than its factorization.

1020001550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20400043 (or 20400038 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1020001550 is about 31937.4631115247. The cubic root of 1020001550 is about 1006.6232194504.

Adding to 1020001550 its reverse (551000201), we get a palindrome (1571001751).

The spelling of 1020001550 in words is "one billion, twenty million, one thousand, five hundred fifty".