2051230421 has 8 divisors (see below), whose sum is σ = 2173497624. Its totient is φ = 1929141760.

The previous prime is 2051230411. The next prime is 2051230427. The reversal of 2051230421 is 1240321502.

It can be written as a sum of positive squares in 4 ways, for example, as 1416694321 + 634536100 = 37639^2 + 25190^2 .

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-2051230421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2051230393 and 2051230402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051230427) 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, 20600 + ... + 67281.

It is an arithmetic number, because the mean of its divisors is an integer number (271687203).

Almost surely, 2^2051230421 is an apocalyptic number.

It is an amenable number.

2051230421 is a deficient number, since it is larger than the sum of its proper divisors (122267203).

2051230421 is a wasteful number, since it uses less digits than its factorization.

2051230421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89271.

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

The square root of 2051230421 is about 45290.5113793165. The cubic root of 2051230421 is about 1270.5881957209.

Adding to 2051230421 its reverse (1240321502), we get a palindrome (3291551923).

The spelling of 2051230421 in words is "two billion, fifty-one million, two hundred thirty thousand, four hundred twenty-one".