2352213781 has 4 divisors (see below), whose sum is σ = 2375050912. Its totient is φ = 2329376652.

The previous prime is 2352213769. The next prime is 2352213791. The reversal of 2352213781 is 1873122532.

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.

It is a cyclic number.

It is not a de Polignac number, because 2352213781 - 2¹¹ = 2352211733 is a prime.

It is a super-2 number, since 2×2352213781² = 11065819343052631922, 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 (2352213701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11418411 + ... + 11418616.

It is an arithmetic number, because the mean of its divisors is an integer number (593762728).

Almost surely, 2^2352213781 is an apocalyptic number.

It is an amenable number.

2352213781 is a deficient number, since it is larger than the sum of its proper divisors (22837131).

2352213781 is a wasteful number, since it uses less digits than its factorization.

2352213781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22837130.

The product of its digits is 20160, while the sum is 34.

The square root of 2352213781 is about 48499.6266068101. The cubic root of 2352213781 is about 1329.9202433941.

The spelling of 2352213781 in words is "two billion, three hundred fifty-two million, two hundred thirteen thousand, seven hundred eighty-one".