126215316551231 has 4 divisors (see below), whose sum is σ = 126216551600712. Its totient is φ = 126214081501752.

The previous prime is 126215316551221. The next prime is 126215316551263. The reversal of 126215316551231 is 132155613512621.

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 126215316551231 - 2²² = 126215312356927 is a prime.

It is a super-2 number, since 2×126215316551231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126215316551221) 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, 617371436 + ... + 617575841.

It is an arithmetic number, because the mean of its divisors is an integer number (31554137900178).

Almost surely, 2^{126215316551231} is an apocalyptic number.

126215316551231 is a deficient number, since it is larger than the sum of its proper divisors (1235049481).

126215316551231 is a wasteful number, since it uses less digits than its factorization.

126215316551231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235049480.

The product of its digits is 324000, while the sum is 44.

The spelling of 126215316551231 in words is "one hundred twenty-six trillion, two hundred fifteen billion, three hundred sixteen million, five hundred fifty-one thousand, two hundred thirty-one".