400213451 has 8 divisors (see below), whose sum is σ = 437977584. Its totient is φ = 362679520.

The previous prime is 400213403. The next prime is 400213481. The reversal of 400213451 is 154312004.

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

It is a cyclic number.

It is not a de Polignac number, because 400213451 - 2¹⁰ = 400212427 is a prime.

It is a super-2 number, since 2×400213451² = 320341612722658802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400213481) 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, 53900 + ... + 60873.

It is an arithmetic number, because the mean of its divisors is an integer number (54747198).

Almost surely, 2^400213451 is an apocalyptic number.

400213451 is a deficient number, since it is larger than the sum of its proper divisors (37764133).

400213451 is a wasteful number, since it uses less digits than its factorization.

400213451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115101.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 400213451 is about 20005.3355632941. The cubic root of 400213451 is about 736.9373364571.

Adding to 400213451 its reverse (154312004), we get a palindrome (554525455).

The spelling of 400213451 in words is "four hundred million, two hundred thirteen thousand, four hundred fifty-one".