401545231 has 2 divisors, whose sum is σ = 401545232. Its totient is φ = 401545230.

The previous prime is 401545181. The next prime is 401545237. The reversal of 401545231 is 132545104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401545231 - 2¹³ = 401537039 is a prime.

It is a super-2 number, since 2×401545231² = 322477145077686722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401545196 and 401545205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401545237) 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 as a sum of consecutive naturals, namely, 200772615 + 200772616.

It is an arithmetic number, because the mean of its divisors is an integer number (200772616).

Almost surely, 2^401545231 is an apocalyptic number.

401545231 is a deficient number, since it is larger than the sum of its proper divisors (1).

401545231 is an equidigital number, since it uses as much as digits as its factorization.

401545231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 401545231 is about 20038.5935384697. The cubic root of 401545231 is about 737.7538605527.

The spelling of 401545231 in words is "four hundred one million, five hundred forty-five thousand, two hundred thirty-one".