381401011 has 4 divisors (see below), whose sum is σ = 394552800. Its totient is φ = 368249224.

The previous prime is 381400997. The next prime is 381401017. The reversal of 381401011 is 110104183.

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 381401011 - 2⁷ = 381400883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381401011.

It is not an unprimeable number, because it can be changed into a prime (381401017) 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, 6575851 + ... + 6575908.

It is an arithmetic number, because the mean of its divisors is an integer number (98638200).

Almost surely, 2^381401011 is an apocalyptic number.

381401011 is a deficient number, since it is larger than the sum of its proper divisors (13151789).

381401011 is a wasteful number, since it uses less digits than its factorization.

381401011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13151788.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 381401011 is about 19529.4908023737. The cubic root of 381401011 is about 725.2047054139.

Adding to 381401011 its reverse (110104183), we get a palindrome (491505194).

The spelling of 381401011 in words is "three hundred eighty-one million, four hundred one thousand, eleven".