2137232261 has 4 divisors (see below), whose sum is σ = 2177557452. Its totient is φ = 2096907072.

The previous prime is 2137232257. The next prime is 2137232291. The reversal of 2137232261 is 1622327312.

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 1511732161 + 625500100 = 38881^2 + 25010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2137232261 - 2² = 2137232257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137232291) 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, 20162516 + ... + 20162621.

It is an arithmetic number, because the mean of its divisors is an integer number (544389363).

Almost surely, 2^2137232261 is an apocalyptic number.

It is an amenable number.

2137232261 is a deficient number, since it is larger than the sum of its proper divisors (40325191).

2137232261 is an equidigital number, since it uses as much as digits as its factorization.

2137232261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40325190.

The product of its digits is 6048, while the sum is 29.

The square root of 2137232261 is about 46230.2093981846. The cubic root of 2137232261 is about 1288.1029466231.

Adding to 2137232261 its reverse (1622327312), we get a palindrome (3759559573).

The spelling of 2137232261 in words is "two billion, one hundred thirty-seven million, two hundred thirty-two thousand, two hundred sixty-one".