1055203001550 has 120 divisors (see below), whose sum is σ = 2934702548712. Its totient is φ = 281118600000.

The previous prime is 1055203001543. The next prime is 1055203001561. The reversal of 1055203001550 is 551003025501.

1055203001550 is a `hidden beast` number, since 10 + 55 + 20 + 30 + 0 + 1 + 550 = 666.

It is a super-2 number, since 2×1055203001550² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4132600 + ... + 4380500.

Almost surely, 2^{1055203001550} is an apocalyptic number.

1055203001550 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 1055203001550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1467351274356).

1055203001550 is an abundant number, since it is smaller than the sum of its proper divisors (1879499547162).

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

1055203001550 is a wasteful number, since it uses less digits than its factorization.

1055203001550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248976 (or 248962 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The spelling of 1055203001550 in words is "one trillion, fifty-five billion, two hundred three million, one thousand, five hundred fifty".