131401645 has 16 divisors (see below), whose sum is σ = 164846592. Its totient is φ = 100362240.

The previous prime is 131401637. The next prime is 131401651. The reversal of 131401645 is 546104131.

It is not a de Polignac number, because 131401645 - 2³ = 131401637 is a prime.

It is a super-3 number, since 3×131401645³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113389 + ... + 114541.

It is an arithmetic number, because the mean of its divisors is an integer number (10302912).

Almost surely, 2^131401645 is an apocalyptic number.

It is an amenable number.

131401645 is a deficient number, since it is larger than the sum of its proper divisors (33444947).

131401645 is a wasteful number, since it uses less digits than its factorization.

131401645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 131401645 is about 11463.0556571972. The cubic root of 131401645 is about 508.3938255223.

Adding to 131401645 its reverse (546104131), we get a palindrome (677505776).

The spelling of 131401645 in words is "one hundred thirty-one million, four hundred one thousand, six hundred forty-five".