61148931 has 8 divisors (see below), whose sum is σ = 81651024. Its totient is φ = 40706400.

The previous prime is 61148929. The next prime is 61148939. The reversal of 61148931 is 13984116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61148931 - 2¹ = 61148929 is a prime.

It is a super-2 number, since 2×61148931² = 7478383524885522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61148892 and 61148901.

It is not an unprimeable number, because it can be changed into a prime (61148939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12436 + ... + 16641.

It is an arithmetic number, because the mean of its divisors is an integer number (10206378).

Almost surely, 2^61148931 is an apocalyptic number.

61148931 is a deficient number, since it is larger than the sum of its proper divisors (20502093).

61148931 is a wasteful number, since it uses less digits than its factorization.

61148931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29781.

The product of its digits is 5184, while the sum is 33.

The square root of 61148931 is about 7819.7781937853. The cubic root of 61148931 is about 393.9698221280.

The spelling of 61148931 in words is "sixty-one million, one hundred forty-eight thousand, nine hundred thirty-one".