4312400021 has 8 divisors (see below), whose sum is σ = 4465453080. Its totient is φ = 4159636992.

The previous prime is 4312400017. The next prime is 4312400107. The reversal of 4312400021 is 1200042134.

It can be written as a sum of positive squares in 4 ways, for example, as 616975921 + 3695424100 = 24839^2 + 60790^2 .

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 4312400021 - 2² = 4312400017 is a prime.

It is a super-2 number, since 2×4312400021² = 37193587882241600882, 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 (4312400011) 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, 42020 + ... + 101933.

It is an arithmetic number, because the mean of its divisors is an integer number (558181635).

Almost surely, 2^4312400021 is an apocalyptic number.

It is an amenable number.

4312400021 is a deficient number, since it is larger than the sum of its proper divisors (153053059).

4312400021 is a wasteful number, since it uses less digits than its factorization.

4312400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145015.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 4312400021 is about 65668.8664513101. The cubic root of 4312400021 is about 1627.6949391123.

Adding to 4312400021 its reverse (1200042134), we get a palindrome (5512442155).

The spelling of 4312400021 in words is "four billion, three hundred twelve million, four hundred thousand, twenty-one".