126515221500 has 96 divisors (see below), whose sum is σ = 373076121600. Its totient is φ = 33310305600.

The previous prime is 126515221471. The next prime is 126515221531. The reversal of 126515221500 is 5122515621.

It is a super-2 number, since 2×126515221500² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 415320 + ... + 652319.

It is an arithmetic number, because the mean of its divisors is an integer number (3886209600).

Almost surely, 2^126515221500 is an apocalyptic number.

126515221500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126515221500 is an abundant number, since it is smaller than the sum of its proper divisors (246560900100).

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

126515221500 is a wasteful number, since it uses less digits than its factorization.

126515221500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067740 (or 1067728 counting only the distinct ones).

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

The spelling of 126515221500 in words is "one hundred twenty-six billion, five hundred fifteen million, two hundred twenty-one thousand, five hundred".