2152338781 has 16 divisors (see below), whose sum is σ = 2266392960. Its totient is φ = 2040079360.

The previous prime is 2152338767. The next prime is 2152338787. The reversal of 2152338781 is 1878332512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2152338781 - 2³¹ = 4855133 is a prime.

It is a super-2 number, since 2×2152338781² = 9265124456393131922, 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 (2152338787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1452561 + ... + 1454041.

It is an arithmetic number, because the mean of its divisors is an integer number (141649560).

Almost surely, 2^2152338781 is an apocalyptic number.

It is an amenable number.

2152338781 is a deficient number, since it is larger than the sum of its proper divisors (114054179).

2152338781 is a wasteful number, since it uses less digits than its factorization.

2152338781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2036.

The product of its digits is 80640, while the sum is 40.

The square root of 2152338781 is about 46393.3053467847. The cubic root of 2152338781 is about 1291.1307076418.

The spelling of 2152338781 in words is "two billion, one hundred fifty-two million, three hundred thirty-eight thousand, seven hundred eighty-one".