401340251 has 16 divisors (see below), whose sum is σ = 453818400. Its totient is φ = 352332288.

The previous prime is 401340241. The next prime is 401340253. The reversal of 401340251 is 152043104.

It is a cyclic number.

It is not a de Polignac number, because 401340251 - 2⁶ = 401340187 is a prime.

It is a super-2 number, since 2×401340251² = 322147994145486002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401340253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17315 + ... + 33203.

It is an arithmetic number, because the mean of its divisors is an integer number (28363650).

Almost surely, 2^401340251 is an apocalyptic number.

401340251 is a deficient number, since it is larger than the sum of its proper divisors (52478149).

401340251 is a wasteful number, since it uses less digits than its factorization.

401340251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15998.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 401340251 is about 20033.4782551608. The cubic root of 401340251 is about 737.6283034844.

Adding to 401340251 its reverse (152043104), we get a palindrome (553383355).

The spelling of 401340251 in words is "four hundred one million, three hundred forty thousand, two hundred fifty-one".