401551511 has 8 divisors (see below), whose sum is σ = 404403840. Its totient is φ = 398705632.

The previous prime is 401551483. The next prime is 401551537. The reversal of 401551511 is 115155104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401551511 is a prime.

It is a super-2 number, since 2×401551511² = 322487231972766242, 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 (401551541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248141 + ... + 249753.

It is an arithmetic number, because the mean of its divisors is an integer number (50550480).

Almost surely, 2^401551511 is an apocalyptic number.

401551511 is a deficient number, since it is larger than the sum of its proper divisors (2852329).

401551511 is a wasteful number, since it uses less digits than its factorization.

401551511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3225.

The product of its (nonzero) digits is 500, while the sum is 23.

The square root of 401551511 is about 20038.7502354813. The cubic root of 401551511 is about 737.7577065869.

It can be divided in two parts, 40 and 1551511, that added together give a palindrome (1551551).

The spelling of 401551511 in words is "four hundred one million, five hundred fifty-one thousand, five hundred eleven".