61951537 has 4 divisors (see below), whose sum is σ = 62403876. Its totient is φ = 61499200.

The previous prime is 61951529. The next prime is 61951543. The reversal of 61951537 is 73515916.

61951537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11128896 + 50822641 = 3336^2 + 7129^2 .

It is a cyclic number.

It is not a de Polignac number, because 61951537 - 2³ = 61951529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61951496 and 61951505.

It is not an unprimeable number, because it can be changed into a prime (61951577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225964 + ... + 226237.

It is an arithmetic number, because the mean of its divisors is an integer number (15600969).

Almost surely, 2^61951537 is an apocalyptic number.

It is an amenable number.

61951537 is a deficient number, since it is larger than the sum of its proper divisors (452339).

61951537 is a wasteful number, since it uses less digits than its factorization.

61951537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452338.

The product of its digits is 28350, while the sum is 37.

The square root of 61951537 is about 7870.9298688274. The cubic root of 61951537 is about 395.6860097315.

The spelling of 61951537 in words is "sixty-one million, nine hundred fifty-one thousand, five hundred thirty-seven".