401531251 has 16 divisors (see below), whose sum is σ = 453427200. Its totient is φ = 352267200.

The previous prime is 401531231. The next prime is 401531269. The reversal of 401531251 is 152135104.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 401531251 - 2¹⁵ = 401498483 is a prime.

It is a super-2 number, since 2×401531251² = 322454691059250002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401531231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138030 + ... + 140908.

It is an arithmetic number, because the mean of its divisors is an integer number (28339200).

Almost surely, 2^401531251 is an apocalyptic number.

401531251 is a deficient number, since it is larger than the sum of its proper divisors (51895949).

401531251 is a wasteful number, since it uses less digits than its factorization.

401531251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 401531251 is about 20038.2447085567. The cubic root of 401531251 is about 737.7452986956.

Adding to 401531251 its reverse (152135104), we get a palindrome (553666355).

The spelling of 401531251 in words is "four hundred one million, five hundred thirty-one thousand, two hundred fifty-one".