61331653 has 4 divisors (see below), whose sum is σ = 62488908. Its totient is φ = 60174400.

The previous prime is 61331623. The next prime is 61331693. The reversal of 61331653 is 35613316.

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 15539364 + 45792289 = 3942^2 + 6767^2 .

It is a cyclic number.

It is not a de Polignac number, because 61331653 - 2⁹ = 61331141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61331623) 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, 578548 + ... + 578653.

It is an arithmetic number, because the mean of its divisors is an integer number (15622227).

Almost surely, 2^61331653 is an apocalyptic number.

It is an amenable number.

61331653 is a deficient number, since it is larger than the sum of its proper divisors (1157255).

61331653 is a wasteful number, since it uses less digits than its factorization.

61331653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157254.

The product of its digits is 4860, while the sum is 28.

The square root of 61331653 is about 7831.4528026414. The cubic root of 61331653 is about 394.3618451714.

Adding to 61331653 its reverse (35613316), we get a palindrome (96944969).

The spelling of 61331653 in words is "sixty-one million, three hundred thirty-one thousand, six hundred fifty-three".