102201551 has 4 divisors (see below), whose sum is σ = 107580600. Its totient is φ = 96822504.

The previous prime is 102201523. The next prime is 102201553. The reversal of 102201551 is 155102201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155102201 = 79 ⋅1963319.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102201551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201553) 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, 2689496 + ... + 2689533.

It is an arithmetic number, because the mean of its divisors is an integer number (26895150).

Almost surely, 2^102201551 is an apocalyptic number.

102201551 is a deficient number, since it is larger than the sum of its proper divisors (5379049).

102201551 is an equidigital number, since it uses as much as digits as its factorization.

102201551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5379048.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 102201551 is about 10109.4782753612. The cubic root of 102201551 is about 467.5404195466.

Adding to 102201551 its reverse (155102201), we get a palindrome (257303752).

The spelling of 102201551 in words is "one hundred two million, two hundred one thousand, five hundred fifty-one".