61253911 has 4 divisors (see below), whose sum is σ = 61297024. Its totient is φ = 61210800.

The previous prime is 61253827. The next prime is 61253921. The reversal of 61253911 is 11935216.

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 61253911 - 2⁷ = 61253783 is a prime.

It is a super-2 number, since 2×61253911² = 7504083225591842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61253911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61253921) 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, 19350 + ... + 22291.

It is an arithmetic number, because the mean of its divisors is an integer number (15324256).

Almost surely, 2^61253911 is an apocalyptic number.

61253911 is a deficient number, since it is larger than the sum of its proper divisors (43113).

61253911 is a wasteful number, since it uses less digits than its factorization.

61253911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43112.

The product of its digits is 1620, while the sum is 28.

The square root of 61253911 is about 7826.4877818853. The cubic root of 61253911 is about 394.1951479871.

The spelling of 61253911 in words is "sixty-one million, two hundred fifty-three thousand, nine hundred eleven".