2131513988 has 6 divisors (see below), whose sum is σ = 3730149486. Its totient is φ = 1065756992.

The previous prime is 2131513973. The next prime is 2131513991. The reversal of 2131513988 is 8893151312.

It can be written as a sum of positive squares in only one way, i.e., 1523497024 + 608016964 = 39032^2 + 24658^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 266439245 + ... + 266439252.

It is an arithmetic number, because the mean of its divisors is an integer number (621691581).

Almost surely, 2^2131513988 is an apocalyptic number.

It is an amenable number.

2131513988 is a deficient number, since it is larger than the sum of its proper divisors (1598635498).

2131513988 is a wasteful number, since it uses less digits than its factorization.

2131513988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532878501 (or 532878499 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 2131513988 is about 46168.3223433557. The cubic root of 2131513988 is about 1286.9531256857.

The spelling of 2131513988 in words is "two billion, one hundred thirty-one million, five hundred thirteen thousand, nine hundred eighty-eight".