131000000 has 98 divisors (see below), whose sum is σ = 327417684. Its totient is φ = 52000000.

The previous prime is 130999997. The next prime is 131000021. The reversal of 131000000 is 131.

It is a super-2 number, since 2×131000000² = 34322000000000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999935 + ... + 1000065.

Almost surely, 2^131000000 is an apocalyptic number.

131000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163708842).

131000000 is an abundant number, since it is smaller than the sum of its proper divisors (196417684).

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

131000000 is an frugal number, since it uses more digits than its factorization.

131000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 3, while the sum is 5.

The square root of 131000000 is about 11445.5231422596. The cubic root of 131000000 is about 507.8753078133.

Adding to 131000000 its reverse (131), we get a palindrome (131000131).

Multiplying 131000000 by its reverse (131), we get a square (17161000000 = 131000²).

131000000 divided by its reverse (131) gives a 6-th power (1000000 = 10⁶).

The spelling of 131000000 in words is "one hundred thirty-one million", and thus it is an aban number.