1215454540031 has 2 divisors, whose sum is σ = 1215454540032. Its totient is φ = 1215454540030.

The previous prime is 1215454539991. The next prime is 1215454540073. The reversal of 1215454540031 is 1300454545121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1215454540031 - 2³⁴ = 1198274670847 is a prime.

It is a super-2 number, since 2×1215454540031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1215454539973 and 1215454540000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1215454540831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 607727270015 + 607727270016.

It is an arithmetic number, because the mean of its divisors is an integer number (607727270016).

Almost surely, 2^{1215454540031} is an apocalyptic number.

1215454540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1215454540031 is an equidigital number, since it uses as much as digits as its factorization.

1215454540031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 1215454540031 in words is "one trillion, two hundred fifteen billion, four hundred fifty-four million, five hundred forty thousand, thirty-one".