61330731 has 32 divisors (see below), whose sum is σ = 103377408. Its totient is φ = 31415040.

The previous prime is 61330729. The next prime is 61330751. The reversal of 61330731 is 13703316.

It is not a de Polignac number, because 61330731 - 2¹ = 61330729 is a prime.

It is a super-2 number, since 2×61330731² = 7522917129988722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61330721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15045 + ... + 18681.

It is an arithmetic number, because the mean of its divisors is an integer number (3230544).

Almost surely, 2^61330731 is an apocalyptic number.

61330731 is a deficient number, since it is larger than the sum of its proper divisors (42046677).

61330731 is a wasteful number, since it uses less digits than its factorization.

61330731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731.

The product of its (nonzero) digits is 1134, while the sum is 24.

The square root of 61330731 is about 7831.3939372247. The cubic root of 61330731 is about 394.3598690116.

The spelling of 61330731 in words is "sixty-one million, three hundred thirty thousand, seven hundred thirty-one".