35722021 has 4 divisors (see below), whose sum is σ = 36482112. Its totient is φ = 34961932.

The previous prime is 35722007. The next prime is 35722031. The reversal of 35722021 is 12022753.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12022753 = 383 ⋅31391.

It is a cyclic number.

It is not a de Polignac number, because 35722021 - 2⁵ = 35721989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 35721983 and 35722001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (35722031) 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, 379975 + ... + 380068.

It is an arithmetic number, because the mean of its divisors is an integer number (9120528).

Almost surely, 2^35722021 is an apocalyptic number.

It is an amenable number.

35722021 is a deficient number, since it is larger than the sum of its proper divisors (760091).

35722021 is an equidigital number, since it uses as much as digits as its factorization.

35722021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760090.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 35722021 is about 5976.7901920680. The cubic root of 35722021 is about 329.3406516492.

Adding to 35722021 its reverse (12022753), we get a palindrome (47744774).

The spelling of 35722021 in words is "thirty-five million, seven hundred twenty-two thousand, twenty-one".