32251421 has 4 divisors (see below), whose sum is σ = 32570844. Its totient is φ = 31932000.

The previous prime is 32251409. The next prime is 32251423. The reversal of 32251421 is 12415223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31416025 + 835396 = 5605^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 32251421 - 2⁶ = 32251357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 32251393 and 32251402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32251423) 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, 159560 + ... + 159761.

It is an arithmetic number, because the mean of its divisors is an integer number (8142711).

Almost surely, 2^32251421 is an apocalyptic number.

It is an amenable number.

32251421 is a deficient number, since it is larger than the sum of its proper divisors (319423).

32251421 is a wasteful number, since it uses less digits than its factorization.

32251421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319422.

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

The square root of 32251421 is about 5679.0334564959. The cubic root of 32251421 is about 318.3095130031.

Adding to 32251421 its reverse (12415223), we get a palindrome (44666644).

The spelling of 32251421 in words is "thirty-two million, two hundred fifty-one thousand, four hundred twenty-one".