1215525255131 has 16 divisors (see below), whose sum is σ = 1368956691456. Its totient is φ = 1069256700000.

The previous prime is 1215525255121. The next prime is 1215525255157. The reversal of 1215525255131 is 1315525255121.

It is a cyclic number.

It is not a de Polignac number, because 1215525255131 - 2⁶ = 1215525255067 is a prime.

It is a super-2 number, since 2×1215525255131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1215525255121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2903981 + ... + 3296081.

It is an arithmetic number, because the mean of its divisors is an integer number (85559793216).

Almost surely, 2^{1215525255131} is an apocalyptic number.

1215525255131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1215525255131 is a deficient number, since it is larger than the sum of its proper divisors (153431436325).

1215525255131 is a wasteful number, since it uses less digits than its factorization.

1215525255131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401234.

The product of its digits is 75000, while the sum is 38.

The spelling of 1215525255131 in words is "one trillion, two hundred fifteen billion, five hundred twenty-five million, two hundred fifty-five thousand, one hundred thirty-one".