1523012213531 has 2 divisors, whose sum is σ = 1523012213532. Its totient is φ = 1523012213530.

The previous prime is 1523012213519. The next prime is 1523012213543. The reversal of 1523012213531 is 1353122103251.

It is a balanced prime because it is at equal distance from previous prime (1523012213519) and next prime (1523012213543).

It is a cyclic number.

It is not a de Polignac number, because 1523012213531 - 2⁶ = 1523012213467 is a prime.

It is a super-2 number, since 2×1523012213531² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1523012213494 and 1523012213503.

It is not a weakly prime, because it can be changed into another prime (1523012213581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761506106765 + 761506106766.

It is an arithmetic number, because the mean of its divisors is an integer number (761506106766).

Almost surely, 2^{1523012213531} is an apocalyptic number.

1523012213531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523012213531 is an equidigital number, since it uses as much as digits as its factorization.

1523012213531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 1523012213531 its reverse (1353122103251), we get a palindrome (2876134316782).

The spelling of 1523012213531 in words is "one trillion, five hundred twenty-three billion, twelve million, two hundred thirteen thousand, five hundred thirty-one".