1377225231 has 4 divisors (see below), whose sum is σ = 1836300312. Its totient is φ = 918150152.

The previous prime is 1377225229. The next prime is 1377225253. The reversal of 1377225231 is 1325227731.

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 1377225231 - 2¹ = 1377225229 is a prime.

It is a super-2 number, since 2×1377225231² = 3793498673806006722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1377225192 and 1377225201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377225271) 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, 229537536 + ... + 229537541.

It is an arithmetic number, because the mean of its divisors is an integer number (459075078).

Almost surely, 2^1377225231 is an apocalyptic number.

1377225231 is a deficient number, since it is larger than the sum of its proper divisors (459075081).

1377225231 is an equidigital number, since it uses as much as digits as its factorization.

1377225231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459075080.

The product of its digits is 17640, while the sum is 33.

The square root of 1377225231 is about 37110.9853143244. The cubic root of 1377225231 is about 1112.5895849418.

The spelling of 1377225231 in words is "one billion, three hundred seventy-seven million, two hundred twenty-five thousand, two hundred thirty-one".