102155125550 has 12 divisors (see below), whose sum is σ = 190008533616. Its totient is φ = 40862050200.

The previous prime is 102155125519. The next prime is 102155125571. The reversal of 102155125550 is 55521551201.

It is a super-2 number, since 2×102155125550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1021551206 + ... + 1021551305.

It is an arithmetic number, because the mean of its divisors is an integer number (15834044468).

Almost surely, 2^102155125550 is an apocalyptic number.

102155125550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102155125550 is a deficient number, since it is larger than the sum of its proper divisors (87853408066).

102155125550 is a wasteful number, since it uses less digits than its factorization.

102155125550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043102523 (or 2043102518 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 32.

Adding to 102155125550 its reverse (55521551201), we get a palindrome (157676676751).

The spelling of 102155125550 in words is "one hundred two billion, one hundred fifty-five million, one hundred twenty-five thousand, five hundred fifty".