102321511545 has 32 divisors (see below), whose sum is σ = 180604287360. Its totient is φ = 49053002240.

The previous prime is 102321511519. The next prime is 102321511549. The reversal of 102321511545 is 545115123201.

It is not a de Polignac number, because 102321511545 - 2¹³ = 102321503353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102321511549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3469194 + ... + 3498563.

It is an arithmetic number, because the mean of its divisors is an integer number (5643883980).

Almost surely, 2^102321511545 is an apocalyptic number.

102321511545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102321511545 is a deficient number, since it is larger than the sum of its proper divisors (78282775815).

102321511545 is a wasteful number, since it uses less digits than its factorization.

102321511545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967865.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 102321511545 its reverse (545115123201), we get a palindrome (647436634746).

The spelling of 102321511545 in words is "one hundred two billion, three hundred twenty-one million, five hundred eleven thousand, five hundred forty-five".