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401553213 = 3133851071
BaseRepresentation
bin10111111011110…
…011011100111101
31000222121000110020
4113323303130331
51310244200323
6103502402353
712644101035
oct2773633475
91028530406
10401553213
11196736966
12b25903b9
1365266569
143b48a8c5
15253bdae3
hex17ef373d

401553213 has 4 divisors (see below), whose sum is σ = 535404288. Its totient is φ = 267702140.

The previous prime is 401553211. The next prime is 401553263. The reversal of 401553213 is 312355104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 401553213 - 21 = 401553211 is a prime.

It is a super-2 number, since 2×4015532132 = 322489965741246738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401553211) 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, 66925533 + ... + 66925538.

It is an arithmetic number, because the mean of its divisors is an integer number (133851072).

Almost surely, 2401553213 is an apocalyptic number.

It is an amenable number.

401553213 is a deficient number, since it is larger than the sum of its proper divisors (133851075).

401553213 is a wasteful number, since it uses less digits than its factorization.

401553213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133851074.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 401553213 is about 20038.7927031545. The cubic root of 401553213 is about 737.7587489287.

The spelling of 401553213 in words is "four hundred one million, five hundred fifty-three thousand, two hundred thirteen".

Divisors: 1 3 133851071 401553213