61134531 has 4 divisors (see below), whose sum is σ = 81512712. Its totient is φ = 40756352.

The previous prime is 61134497. The next prime is 61134547. The reversal of 61134531 is 13543116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61134531 - 2⁶ = 61134467 is a prime.

It is a super-2 number, since 2×61134531² = 7474861761179922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61134631) 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, 10189086 + ... + 10189091.

It is an arithmetic number, because the mean of its divisors is an integer number (20378178).

Almost surely, 2^61134531 is an apocalyptic number.

61134531 is a deficient number, since it is larger than the sum of its proper divisors (20378181).

61134531 is a wasteful number, since it uses less digits than its factorization.

61134531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20378180.

The product of its digits is 1080, while the sum is 24.

The square root of 61134531 is about 7818.8573973439. The cubic root of 61134531 is about 393.9388943002.

Adding to 61134531 its reverse (13543116), we get a palindrome (74677647).

The spelling of 61134531 in words is "sixty-one million, one hundred thirty-four thousand, five hundred thirty-one".