32961551 has 4 divisors (see below), whose sum is σ = 37670352. Its totient is φ = 28252752.

The previous prime is 32961503. The next prime is 32961557. The reversal of 32961551 is 15516923.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15516923 = 853 ⋅18191.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-32961551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32961557) 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, 2354390 + ... + 2354403.

It is an arithmetic number, because the mean of its divisors is an integer number (9417588).

Almost surely, 2^32961551 is an apocalyptic number.

32961551 is a deficient number, since it is larger than the sum of its proper divisors (4708801).

32961551 is an equidigital number, since it uses as much as digits as its factorization.

32961551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708800.

The product of its digits is 8100, while the sum is 32.

The square root of 32961551 is about 5741.2151152870. The cubic root of 32961551 is about 320.6288123781.

The spelling of 32961551 in words is "thirty-two million, nine hundred sixty-one thousand, five hundred fifty-one".