1055378831 has 4 divisors (see below), whose sum is σ = 1136561832. Its totient is φ = 974195832.

The previous prime is 1055378803. The next prime is 1055378839. The reversal of 1055378831 is 1388735501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1055378831 - 2¹⁸ = 1055116687 is a prime.

It is a super-2 number, since 2×1055378831² = 2227648953845853122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055378839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40591481 + ... + 40591506.

It is an arithmetic number, because the mean of its divisors is an integer number (284140458).

Almost surely, 2^1055378831 is an apocalyptic number.

1055378831 is a deficient number, since it is larger than the sum of its proper divisors (81183001).

1055378831 is an equidigital number, since it uses as much as digits as its factorization.

1055378831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81183000.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 1055378831 is about 32486.5946353261. The cubic root of 1055378831 is about 1018.1289648810.

The spelling of 1055378831 in words is "one billion, fifty-five million, three hundred seventy-eight thousand, eight hundred thirty-one".