1381191552 has 96 divisors (see below), whose sum is σ = 4280301480. Its totient is φ = 424977408.

The previous prime is 1381191547. The next prime is 1381191563. The reversal of 1381191552 is 2551911831.

1381191552 is a `hidden beast` number, since 1 + 3 + 8 + 11 + 91 + 552 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31138 + ... + 61089.

Almost surely, 2^1381191552 is an apocalyptic number.

1381191552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381191552 is an abundant number, since it is smaller than the sum of its proper divisors (2899109928).

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

1381191552 is a wasteful number, since it uses less digits than its factorization.

1381191552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92260 (or 92245 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The square root of 1381191552 is about 37164.3855323884. The cubic root of 1381191552 is about 1113.6566236567.

The spelling of 1381191552 in words is "one billion, three hundred eighty-one million, one hundred ninety-one thousand, five hundred fifty-two".