3731521157 has 12 divisors (see below), whose sum is σ = 4674653676. Its totient is φ = 2952411840.

The previous prime is 3731521153. The next prime is 3731521201. The reversal of 3731521157 is 7511251373.

3731521157 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2468003041 + 1263518116 = 49679^2 + 35546^2 .

It is not a de Polignac number, because 3731521157 - 2² = 3731521153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3731521153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2928344 + ... + 2929617.

It is an arithmetic number, because the mean of its divisors is an integer number (389554473).

Almost surely, 2^3731521157 is an apocalyptic number.

It is an amenable number.

3731521157 is a deficient number, since it is larger than the sum of its proper divisors (943132519).

3731521157 is a wasteful number, since it uses less digits than its factorization.

3731521157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5857988 (or 5857981 counting only the distinct ones).

The product of its digits is 22050, while the sum is 35.

The square root of 3731521157 is about 61086.1781174760. The cubic root of 3731521157 is about 1551.0601359318.

The spelling of 3731521157 in words is "three billion, seven hundred thirty-one million, five hundred twenty-one thousand, one hundred fifty-seven".