1401038831 has 4 divisors (see below), whose sum is σ = 1446233664. Its totient is φ = 1355844000.

The previous prime is 1401038827. The next prime is 1401038861. The reversal of 1401038831 is 1388301041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1388301041 = 41 ⋅33861001.

It is a cyclic number.

It is not a de Polignac number, because 1401038831 - 2² = 1401038827 is a prime.

It is a super-2 number, since 2×1401038831² = 3925819611939693122, 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 = 1401038794 and 1401038803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401038861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22597370 + ... + 22597431.

It is an arithmetic number, because the mean of its divisors is an integer number (361558416).

Almost surely, 2^1401038831 is an apocalyptic number.

1401038831 is a deficient number, since it is larger than the sum of its proper divisors (45194833).

1401038831 is an equidigital number, since it uses as much as digits as its factorization.

1401038831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45194832.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1401038831 is about 37430.4532566732. The cubic root of 1401038831 is about 1118.9655709931.

Adding to 1401038831 its reverse (1388301041), we get a palindrome (2789339872).

The spelling of 1401038831 in words is "one billion, four hundred one million, thirty-eight thousand, eight hundred thirty-one".