401231851 has 2 divisors, whose sum is σ = 401231852. Its totient is φ = 401231850.

The previous prime is 401231821. The next prime is 401231861. The reversal of 401231851 is 158132104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401231851 - 2¹⁵ = 401199083 is a prime.

It is a super-3 number, since 3×401231851³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (401231821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200615925 + 200615926.

It is an arithmetic number, because the mean of its divisors is an integer number (200615926).

Almost surely, 2^401231851 is an apocalyptic number.

401231851 is a deficient number, since it is larger than the sum of its proper divisors (1).

401231851 is an equidigital number, since it uses as much as digits as its factorization.

401231851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 401231851 is about 20030.7726011754. The cubic root of 401231851 is about 737.5618875960.

Adding to 401231851 its reverse (158132104), we get a palindrome (559363955).

The spelling of 401231851 in words is "four hundred one million, two hundred thirty-one thousand, eight hundred fifty-one".