401033551 has 4 divisors (see below), whose sum is σ = 422140600. Its totient is φ = 379926504.

The previous prime is 401033537. The next prime is 401033617. The reversal of 401033551 is 155330104.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401033551 - 2¹¹ = 401031503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401033651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10553496 + ... + 10553533.

It is an arithmetic number, because the mean of its divisors is an integer number (105535150).

Almost surely, 2^401033551 is an apocalyptic number.

401033551 is a deficient number, since it is larger than the sum of its proper divisors (21107049).

401033551 is a wasteful number, since it uses less digits than its factorization.

401033551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21107048.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 401033551 is about 20025.8221054717. The cubic root of 401033551 is about 737.4403596701.

Adding to 401033551 its reverse (155330104), we get a palindrome (556363655).

The spelling of 401033551 in words is "four hundred one million, thirty-three thousand, five hundred fifty-one".