1401388231 has 8 divisors (see below), whose sum is σ = 1426420224. Its totient is φ = 1376575200.

The previous prime is 1401388223. The next prime is 1401388243. The reversal of 1401388231 is 1328831041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1401388231 - 2³ = 1401388223 is a prime.

It is a super-2 number, since 2×1401388231² = 3927777947970618722, 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 = 1401388193 and 1401388202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401388271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41800 + ... + 67453.

It is an arithmetic number, because the mean of its divisors is an integer number (178302528).

Almost surely, 2^1401388231 is an apocalyptic number.

1401388231 is a deficient number, since it is larger than the sum of its proper divisors (25031993).

1401388231 is a wasteful number, since it uses less digits than its factorization.

1401388231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109481.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1401388231 is about 37435.1202883068. The cubic root of 1401388231 is about 1119.0585815187.

The spelling of 1401388231 in words is "one billion, four hundred one million, three hundred eighty-eight thousand, two hundred thirty-one".