101521487 has 2 divisors, whose sum is σ = 101521488. Its totient is φ = 101521486.

The previous prime is 101521429. The next prime is 101521531. The reversal of 101521487 is 784125101.

It is a strong prime.

It is an emirp because it is prime and its reverse (784125101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101521487 - 2⁶ = 101521423 is a prime.

It is a super-2 number, since 2×101521487² = 20613224645382338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101521087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50760743 + 50760744.

It is an arithmetic number, because the mean of its divisors is an integer number (50760744).

Almost surely, 2^101521487 is an apocalyptic number.

101521487 is a deficient number, since it is larger than the sum of its proper divisors (1).

101521487 is an equidigital number, since it uses as much as digits as its factorization.

101521487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 101521487 is about 10075.7871652789. The cubic root of 101521487 is about 466.5010834881.

Adding to 101521487 its reverse (784125101), we get a palindrome (885646588).

The spelling of 101521487 in words is "one hundred one million, five hundred twenty-one thousand, four hundred eighty-seven".