401551451 has 4 divisors (see below), whose sum is σ = 458915952. Its totient is φ = 344186952.

The previous prime is 401551433. The next prime is 401551459. The reversal of 401551451 is 154155104.

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 401551451 - 2⁶ = 401551387 is a prime.

It is a super-2 number, since 2×401551451² = 322487135600410802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401551451.

It is not an unprimeable number, because it can be changed into a prime (401551459) 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, 28682240 + ... + 28682253.

It is an arithmetic number, because the mean of its divisors is an integer number (114728988).

Almost surely, 2^401551451 is an apocalyptic number.

401551451 is a deficient number, since it is larger than the sum of its proper divisors (57364501).

401551451 is an equidigital number, since it uses as much as digits as its factorization.

401551451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57364500.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 401551451 is about 20038.7487383818. The cubic root of 401551451 is about 737.7576698415.

The spelling of 401551451 in words is "four hundred one million, five hundred fifty-one thousand, four hundred fifty-one".