1381954155 has 16 divisors (see below), whose sum is σ = 2211609120. Its totient is φ = 736881408.

The previous prime is 1381954141. The next prime is 1381954163. The reversal of 1381954155 is 5514591831.

It is not a de Polignac number, because 1381954155 - 2⁷ = 1381954027 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99519 + ... + 112551.

It is an arithmetic number, because the mean of its divisors is an integer number (138225570).

Almost surely, 2^1381954155 is an apocalyptic number.

1381954155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1381954155 is a deficient number, since it is larger than the sum of its proper divisors (829654965).

1381954155 is a wasteful number, since it uses less digits than its factorization.

1381954155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20110.

The product of its digits is 108000, while the sum is 42.

The square root of 1381954155 is about 37174.6439794654. The cubic root of 1381954155 is about 1113.8615485574.

The spelling of 1381954155 in words is "one billion, three hundred eighty-one million, nine hundred fifty-four thousand, one hundred fifty-five".