1213552540431 has 24 divisors (see below), whose sum is σ = 2185445268864. Its totient is φ = 630416903760.

The previous prime is 1213552540411. The next prime is 1213552540463. The reversal of 1213552540431 is 1340452553121.

1213552540431 is a `hidden beast` number, since 1 + 2 + 1 + 35 + 52 + 540 + 4 + 31 = 666.

It is not a de Polignac number, because 1213552540431 - 2²³ = 1213544151823 is a prime.

It is a super-2 number, since 2×1213552540431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213552540411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 875578341 + ... + 875579726.

It is an arithmetic number, because the mean of its divisors is an integer number (91060219536).

Almost surely, 2^{1213552540431} is an apocalyptic number.

1213552540431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213552540431 is a deficient number, since it is larger than the sum of its proper divisors (971892728433).

1213552540431 is a wasteful number, since it uses less digits than its factorization.

1213552540431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1751158091 (or 1751158088 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The spelling of 1213552540431 in words is "one trillion, two hundred thirteen billion, five hundred fifty-two million, five hundred forty thousand, four hundred thirty-one".