103521157 has 2 divisors, whose sum is σ = 103521158. Its totient is φ = 103521156.

The previous prime is 103521149. The next prime is 103521161. The reversal of 103521157 is 751125301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81252196 + 22268961 = 9014^2 + 4719^2 .

It is a cyclic number.

It is not a de Polignac number, because 103521157 - 2³ = 103521149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (103521757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51760578 + 51760579.

It is an arithmetic number, because the mean of its divisors is an integer number (51760579).

Almost surely, 2^103521157 is an apocalyptic number.

It is an amenable number.

103521157 is a deficient number, since it is larger than the sum of its proper divisors (1).

103521157 is an equidigital number, since it uses as much as digits as its factorization.

103521157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 103521157 is about 10174.5347313772. The cubic root of 103521157 is about 469.5440833139.

Adding to 103521157 its reverse (751125301), we get a palindrome (854646458).

The spelling of 103521157 in words is "one hundred three million, five hundred twenty-one thousand, one hundred fifty-seven".