1377311231 has 16 divisors (see below), whose sum is σ = 1453443264. Its totient is φ = 1302622464.

The previous prime is 1377311227. The next prime is 1377311233. The reversal of 1377311231 is 1321137731.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1377311231 - 2² = 1377311227 is a prime.

It is a super-2 number, since 2×1377311231² = 3793972454077470722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1377311194 and 1377311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377311233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840545 + ... + 842181.

It is an arithmetic number, because the mean of its divisors is an integer number (90840204).

Almost surely, 2^1377311231 is an apocalyptic number.

1377311231 is a deficient number, since it is larger than the sum of its proper divisors (76132033).

1377311231 is a wasteful number, since it uses less digits than its factorization.

1377311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050.

The product of its digits is 2646, while the sum is 29.

The square root of 1377311231 is about 37112.1439827989. The cubic root of 1377311231 is about 1112.6127427886.

Adding to 1377311231 its reverse (1321137731), we get a palindrome (2698448962).

The spelling of 1377311231 in words is "one billion, three hundred seventy-seven million, three hundred eleven thousand, two hundred thirty-one".