101242551 has 16 divisors (see below), whose sum is σ = 136281600. Its totient is φ = 66853248.

The previous prime is 101242517. The next prime is 101242553. The reversal of 101242551 is 155242101.

It is not a de Polignac number, because 101242551 - 2⁷ = 101242423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101242553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241420 + ... + 241838.

It is an arithmetic number, because the mean of its divisors is an integer number (8517600).

Almost surely, 2^101242551 is an apocalyptic number.

101242551 is a deficient number, since it is larger than the sum of its proper divisors (35039049).

101242551 is a wasteful number, since it uses less digits than its factorization.

101242551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 101242551 is about 10061.9357481550. The cubic root of 101242551 is about 466.0734456004.

Adding to 101242551 its reverse (155242101), we get a palindrome (256484652).

The spelling of 101242551 in words is "one hundred one million, two hundred forty-two thousand, five hundred fifty-one".