901231381 has 4 divisors (see below), whose sum is σ = 907715200. Its totient is φ = 894747564.

The previous prime is 901231369. The next prime is 901231391. The reversal of 901231381 is 183132109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183132109 = 17 ⋅10772477.

It is a cyclic number.

It is not a de Polignac number, because 901231381 - 2¹¹ = 901229333 is a prime.

It is a super-2 number, since 2×901231381² = 1624436004198334322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (901231321) 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, 3241701 + ... + 3241978.

It is an arithmetic number, because the mean of its divisors is an integer number (226928800).

Almost surely, 2^901231381 is an apocalyptic number.

It is an amenable number.

901231381 is a deficient number, since it is larger than the sum of its proper divisors (6483819).

901231381 is a wasteful number, since it uses less digits than its factorization.

901231381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6483818.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 901231381 is about 30020.5160015613. The cubic root of 901231381 is about 965.9295118220.

The spelling of 901231381 in words is "nine hundred one million, two hundred thirty-one thousand, three hundred eighty-one".