102153551 has 4 divisors (see below), whose sum is σ = 102462504. Its totient is φ = 101844600.

The previous prime is 102153539. The next prime is 102153553. The reversal of 102153551 is 155351201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102153551 - 2⁶ = 102153487 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 (102153553) 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, 153980 + ... + 154641.

It is an arithmetic number, because the mean of its divisors is an integer number (25615626).

Almost surely, 2^102153551 is an apocalyptic number.

102153551 is a deficient number, since it is larger than the sum of its proper divisors (308953).

102153551 is an equidigital number, since it uses as much as digits as its factorization.

102153551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308952.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 102153551 is about 10107.1039868006. The cubic root of 102153551 is about 467.4672130437.

The spelling of 102153551 in words is "one hundred two million, one hundred fifty-three thousand, five hundred fifty-one".