61634031 has 4 divisors (see below), whose sum is σ = 82178712. Its totient is φ = 41089352.

The previous prime is 61634021. The next prime is 61634047. The reversal of 61634031 is 13043616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61634031 is a prime.

It is a super-2 number, since 2×61634031² = 7597507554617922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61633992 and 61634010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61634021) 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, 10272336 + ... + 10272341.

It is an arithmetic number, because the mean of its divisors is an integer number (20544678).

Almost surely, 2^61634031 is an apocalyptic number.

61634031 is a deficient number, since it is larger than the sum of its proper divisors (20544681).

61634031 is a wasteful number, since it uses less digits than its factorization.

61634031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20544680.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 61634031 is about 7850.7344242434. The cubic root of 61634031 is about 395.0088787194.

Adding to 61634031 its reverse (13043616), we get a palindrome (74677647).

The spelling of 61634031 in words is "sixty-one million, six hundred thirty-four thousand, thirty-one".