131402131 has 4 divisors (see below), whose sum is σ = 150173872. Its totient is φ = 112630392.

The previous prime is 131402107. The next prime is 131402137. The reversal of 131402131 is 131204131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131204131 = 487 ⋅269413.

It is not a de Polignac number, because 131402131 - 2¹¹ = 131400083 is a prime.

It is a super-2 number, since 2×131402131² = 34533040062682322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131402137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9385860 + ... + 9385873.

It is an arithmetic number, because the mean of its divisors is an integer number (37543468).

Almost surely, 2^131402131 is an apocalyptic number.

131402131 is a deficient number, since it is larger than the sum of its proper divisors (18771741).

131402131 is an equidigital number, since it uses as much as digits as its factorization.

131402131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18771740.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 131402131 is about 11463.0768557137. The cubic root of 131402131 is about 508.3944523006.

Adding to 131402131 its reverse (131204131), we get a palindrome (262606262).

The spelling of 131402131 in words is "one hundred thirty-one million, four hundred two thousand, one hundred thirty-one".