61231953 has 4 divisors (see below), whose sum is σ = 81642608. Its totient is φ = 40821300.

The previous prime is 61231931. The next prime is 61231969. The reversal of 61231953 is 35913216.

61231953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61231953 - 2⁵ = 61231921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61231953.

It is not an unprimeable number, because it can be changed into a prime (61231993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10205323 + ... + 10205328.

It is an arithmetic number, because the mean of its divisors is an integer number (20410652).

Almost surely, 2^61231953 is an apocalyptic number.

It is an amenable number.

61231953 is a deficient number, since it is larger than the sum of its proper divisors (20410655).

61231953 is a wasteful number, since it uses less digits than its factorization.

61231953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20410654.

The product of its digits is 4860, while the sum is 30.

The square root of 61231953 is about 7825.0848557699. The cubic root of 61231953 is about 394.1480393132.

The spelling of 61231953 in words is "sixty-one million, two hundred thirty-one thousand, nine hundred fifty-three".