61725051 has 16 divisors (see below), whose sum is σ = 91614720. Its totient is φ = 41073480.

The previous prime is 61725047. The next prime is 61725071. The reversal of 61725051 is 15052716.

It is not a de Polignac number, because 61725051 - 2² = 61725047 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (61725071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15226 + ... + 18848.

It is an arithmetic number, because the mean of its divisors is an integer number (5725920).

Almost surely, 2^61725051 is an apocalyptic number.

61725051 is a deficient number, since it is larger than the sum of its proper divisors (29889669).

61725051 is a wasteful number, since it uses less digits than its factorization.

61725051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263 (or 4257 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 61725051 is about 7856.5291955163. The cubic root of 61725051 is about 395.2032303542.

Adding to 61725051 its reverse (15052716), we get a palindrome (76777767).

The spelling of 61725051 in words is "sixty-one million, seven hundred twenty-five thousand, fifty-one".