102311442 has 24 divisors (see below), whose sum is σ = 222842880. Its totient is φ = 33924120.

The previous prime is 102311353. The next prime is 102311477. The reversal of 102311442 is 244113201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11442 + ... + 18317.

It is an arithmetic number, because the mean of its divisors is an integer number (9285120).

Almost surely, 2^102311442 is an apocalyptic number.

102311442 is an abundant number, since it is smaller than the sum of its proper divisors (120531438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102311442 is a wasteful number, since it uses less digits than its factorization.

102311442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29958 (or 29955 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 102311442 is about 10114.9118631850. The cubic root of 102311442 is about 467.7079319442.

Adding to 102311442 its reverse (244113201), we get a palindrome (346424643).

The spelling of 102311442 in words is "one hundred two million, three hundred eleven thousand, four hundred forty-two".