125651331236531 has 4 divisors (see below), whose sum is σ = 126204861330312. Its totient is φ = 125097801142752.

The previous prime is 125651331236419. The next prime is 125651331236533. The reversal of 125651331236531 is 135632133156521.

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 125651331236531 - 2²⁶ = 125651264127667 is a prime.

It is a super-2 number, since 2×125651331236531² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125651331236533) 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, 276765046550 + ... + 276765047003.

It is an arithmetic number, because the mean of its divisors is an integer number (31551215332578).

Almost surely, 2^{125651331236531} is an apocalyptic number.

125651331236531 is a deficient number, since it is larger than the sum of its proper divisors (553530093781).

125651331236531 is an equidigital number, since it uses as much as digits as its factorization.

125651331236531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553530093780.

The product of its digits is 1458000, while the sum is 47.

The spelling of 125651331236531 in words is "one hundred twenty-five trillion, six hundred fifty-one billion, three hundred thirty-one million, two hundred thirty-six thousand, five hundred thirty-one".