2131021526 has 4 divisors (see below), whose sum is σ = 3196532292. Its totient is φ = 1065510762.

The previous prime is 2131021493. The next prime is 2131021537. The reversal of 2131021526 is 6251201312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532755380 + ... + 532755383.

It is an arithmetic number, because the mean of its divisors is an integer number (799133073).

Almost surely, 2^2131021526 is an apocalyptic number.

2131021526 is a deficient number, since it is larger than the sum of its proper divisors (1065510766).

2131021526 is a wasteful number, since it uses less digits than its factorization.

2131021526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065510765.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2131021526 is about 46162.9887030725. The cubic root of 2131021526 is about 1286.8540061039.

Adding to 2131021526 its reverse (6251201312), we get a palindrome (8382222838).

The spelling of 2131021526 in words is "two billion, one hundred thirty-one million, twenty-one thousand, five hundred twenty-six".