61340511 has 4 divisors (see below), whose sum is σ = 81787352. Its totient is φ = 40893672.

The previous prime is 61340509. The next prime is 61340519. The reversal of 61340511 is 11504316.

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

It is not a de Polignac number, because 61340511 - 2¹ = 61340509 is a prime.

It is a super-3 number, since 3×61340511³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61340519) 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, 10223416 + ... + 10223421.

It is an arithmetic number, because the mean of its divisors is an integer number (20446838).

Almost surely, 2^61340511 is an apocalyptic number.

61340511 is a deficient number, since it is larger than the sum of its proper divisors (20446841).

61340511 is a wasteful number, since it uses less digits than its factorization.

61340511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20446840.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 61340511 is about 7832.0183222462. The cubic root of 61340511 is about 394.3808298712.

Adding to 61340511 its reverse (11504316), we get a palindrome (72844827).

The spelling of 61340511 in words is "sixty-one million, three hundred forty thousand, five hundred eleven".