61548313 has 4 divisors (see below), whose sum is σ = 65168820. Its totient is φ = 57927808.

The previous prime is 61548307. The next prime is 61548337. The reversal of 61548313 is 31384516.

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 36578304 + 24970009 = 6048^2 + 4997^2 .

It is a cyclic number.

It is not a de Polignac number, because 61548313 - 2¹³ = 61540121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61548373) 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, 1810228 + ... + 1810261.

It is an arithmetic number, because the mean of its divisors is an integer number (16292205).

Almost surely, 2^61548313 is an apocalyptic number.

It is an amenable number.

61548313 is a deficient number, since it is larger than the sum of its proper divisors (3620507).

61548313 is a wasteful number, since it uses less digits than its factorization.

61548313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620506.

The product of its digits is 8640, while the sum is 31.

The square root of 61548313 is about 7845.2732903322. The cubic root of 61548313 is about 394.8256732219.

The spelling of 61548313 in words is "sixty-one million, five hundred forty-eight thousand, three hundred thirteen".