32001551261 has 4 divisors (see below), whose sum is σ = 32003862012. Its totient is φ = 31999240512.

The previous prime is 32001551251. The next prime is 32001551273. The reversal of 32001551261 is 16215510023.

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

It can be written as a sum of positive squares in 2 ways, for example, as 20336471236 + 11665080025 = 142606^2 + 108005^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001551261 - 2²² = 31997356957 is a prime.

It is a super-2 number, since 2×32001551261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 32001551261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32001551221) 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, 1134476 + ... + 1162341.

It is an arithmetic number, because the mean of its divisors is an integer number (8000965503).

Almost surely, 2^32001551261 is an apocalyptic number.

It is an amenable number.

32001551261 is a deficient number, since it is larger than the sum of its proper divisors (2310751).

32001551261 is a wasteful number, since it uses less digits than its factorization.

32001551261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310750.

The product of its (nonzero) digits is 1800, while the sum is 26.

The spelling of 32001551261 in words is "thirty-two billion, one million, five hundred fifty-one thousand, two hundred sixty-one".