61313501 has 4 divisors (see below), whose sum is σ = 61330332. Its totient is φ = 61296672.

The previous prime is 61313489. The next prime is 61313507. The reversal of 61313501 is 10531316.

It is a happy number.

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 53304601 + 8008900 = 7301^2 + 2830^2 .

It is a cyclic number.

It is not a de Polignac number, because 61313501 - 2¹⁰ = 61312477 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 (61313507) 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, 416 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (15332583).

Almost surely, 2^61313501 is an apocalyptic number.

It is an amenable number.

61313501 is a deficient number, since it is larger than the sum of its proper divisors (16831).

61313501 is a wasteful number, since it uses less digits than its factorization.

61313501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 61313501 is about 7830.2938003628. The cubic root of 61313501 is about 394.3229356133.

Adding to 61313501 its reverse (10531316), we get a palindrome (71844817).

The spelling of 61313501 in words is "sixty-one million, three hundred thirteen thousand, five hundred one".