61255137 has 4 divisors (see below), whose sum is σ = 81673520. Its totient is φ = 40836756.

The previous prime is 61255133. The next prime is 61255151. The reversal of 61255137 is 73155216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61255137 - 2² = 61255133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61255133) 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, 10209187 + ... + 10209192.

It is an arithmetic number, because the mean of its divisors is an integer number (20418380).

Almost surely, 2^61255137 is an apocalyptic number.

It is an amenable number.

61255137 is a deficient number, since it is larger than the sum of its proper divisors (20418383).

61255137 is a wasteful number, since it uses less digits than its factorization.

61255137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20418382.

The product of its digits is 6300, while the sum is 30.

The square root of 61255137 is about 7826.5661052597. The cubic root of 61255137 is about 394.1977779146.

The spelling of 61255137 in words is "sixty-one million, two hundred fifty-five thousand, one hundred thirty-seven".