400047553 has 16 divisors (see below), whose sum is σ = 437261760. Its totient is φ = 364548096.

The previous prime is 400047517. The next prime is 400047569. The reversal of 400047553 is 355740004.

It is a cyclic number.

It is not a de Polignac number, because 400047553 - 2¹³ = 400039361 is a prime.

It is a super-2 number, since 2×400047553² = 320076089322575618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400042553) 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, 64225 + ... + 70177.

It is an arithmetic number, because the mean of its divisors is an integer number (27328860).

Almost surely, 2^400047553 is an apocalyptic number.

It is an amenable number.

400047553 is a deficient number, since it is larger than the sum of its proper divisors (37214207).

400047553 is a wasteful number, since it uses less digits than its factorization.

400047553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6096.

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 400047553 is about 20001.1887896695. The cubic root of 400047553 is about 736.8354963628.

Adding to 400047553 its reverse (355740004), we get a palindrome (755787557).

The spelling of 400047553 in words is "four hundred million, forty-seven thousand, five hundred fifty-three".