131001396540 has 48 divisors (see below), whose sum is σ = 419204470272. Its totient is φ = 29943176256.

The previous prime is 131001396511. The next prime is 131001396569. The reversal of 131001396540 is 45693100131.

It is an interprime number because it is at equal distance from previous prime (131001396511) and next prime (131001396569).

It is a super-2 number, since 2×131001396540² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155953624 + ... + 155954463.

It is an arithmetic number, because the mean of its divisors is an integer number (8733426464).

Almost surely, 2^131001396540 is an apocalyptic number.

131001396540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131001396540 is an abundant number, since it is smaller than the sum of its proper divisors (288203073732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131001396540 is a wasteful number, since it uses less digits than its factorization.

131001396540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311908106 (or 311908104 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

Adding to 131001396540 its reverse (45693100131), we get a palindrome (176694496671).

The spelling of 131001396540 in words is "one hundred thirty-one billion, one million, three hundred ninety-six thousand, five hundred forty".