1651521132 has 36 divisors (see below), whose sum is σ = 4195887696. Its totient is φ = 547710240.

The previous prime is 1651521119. The next prime is 1651521143. The reversal of 1651521132 is 2311251561.

1651521132 is a `hidden beast` number, since 1 + 6 + 5 + 1 + 521 + 132 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1651521132² = 5455044098885122848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1651521096 and 1651521105.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109344 + ... + 123527.

It is an arithmetic number, because the mean of its divisors is an integer number (116552436).

Almost surely, 2^1651521132 is an apocalyptic number.

1651521132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1651521132 is an abundant number, since it is smaller than the sum of its proper divisors (2544366564).

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

1651521132 is a wasteful number, since it uses less digits than its factorization.

1651521132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233078 (or 233073 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1651521132 is about 40638.9115503848. The cubic root of 1651521132 is about 1182.0287641054.

Adding to 1651521132 its reverse (2311251561), we get a palindrome (3962772693).

It can be divided in two parts, 1651521 and 132, that added together give a triangular number (1651653 = T₁₈₁₇).

The spelling of 1651521132 in words is "one billion, six hundred fifty-one million, five hundred twenty-one thousand, one hundred thirty-two".