1385225831 has 16 divisors (see below), whose sum is σ = 1524703488. Its totient is φ = 1248048000.

The previous prime is 1385225801. The next prime is 1385225839.

1385225831 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1385225831 - 2¹⁰ = 1385224807 is a prime.

It is a super-2 number, since 2×1385225831² = 3837701205739281122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385225839) 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, 1067375 + ... + 1068671.

It is an arithmetic number, because the mean of its divisors is an integer number (95293968).

Almost surely, 2^1385225831 is an apocalyptic number.

1385225831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1385225831 is a deficient number, since it is larger than the sum of its proper divisors (139477657).

1385225831 is a wasteful number, since it uses less digits than its factorization.

1385225831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its digits is 57600, while the sum is 38.

The square root of 1385225831 is about 37218.6220996963. The cubic root of 1385225831 is about 1114.7398512301.

The spelling of 1385225831 in words is "one billion, three hundred eighty-five million, two hundred twenty-five thousand, eight hundred thirty-one".