401204551 has 16 divisors (see below), whose sum is σ = 463685760. Its totient is φ = 343306080.

The previous prime is 401204533. The next prime is 401204563. The reversal of 401204551 is 155402104.

It is a cyclic number.

It is not a de Polignac number, because 401204551 - 2¹³ = 401196359 is a prime.

It is a super-2 number, since 2×401204551² = 321930183486223202, 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 (401234551) 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, 26700 + ... + 38926.

It is an arithmetic number, because the mean of its divisors is an integer number (28980360).

Almost surely, 2^401204551 is an apocalyptic number.

401204551 is a deficient number, since it is larger than the sum of its proper divisors (62481209).

401204551 is a wasteful number, since it uses less digits than its factorization.

401204551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12414.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 401204551 is about 20030.0911380852. The cubic root of 401204551 is about 737.5451591997.

Adding to 401204551 its reverse (155402104), we get a palindrome (556606655).

The spelling of 401204551 in words is "four hundred one million, two hundred four thousand, five hundred fifty-one".