2231601157 has 4 divisors (see below), whose sum is σ = 2231697600. Its totient is φ = 2231504716.

The previous prime is 2231601131. The next prime is 2231601181. The reversal of 2231601157 is 7511061322.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2231601157 - 2¹¹ = 2231599109 is a prime.

It is a super-3 number, since 3×2231601157³ (a number of 29 digits) contains 333 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 (2231601187) 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, 9594 + ... + 67492.

It is an arithmetic number, because the mean of its divisors is an integer number (557924400).

Almost surely, 2^2231601157 is an apocalyptic number.

It is an amenable number.

2231601157 is a deficient number, since it is larger than the sum of its proper divisors (96443).

2231601157 is an equidigital number, since it uses as much as digits as its factorization.

2231601157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96442.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 2231601157 is about 47239.8259628462. The cubic root of 2231601157 is about 1306.7891680742.

Adding to 2231601157 its reverse (7511061322), we get a palindrome (9742662479).

The spelling of 2231601157 in words is "two billion, two hundred thirty-one million, six hundred one thousand, one hundred fifty-seven".