61504351 has 4 divisors (see below), whose sum is σ = 65122272. Its totient is φ = 57886432.

The previous prime is 61504337. The next prime is 61504361. The reversal of 61504351 is 15340516.

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 61504351 - 2⁹ = 61503839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61504361) 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, 1808935 + ... + 1808968.

It is an arithmetic number, because the mean of its divisors is an integer number (16280568).

Almost surely, 2^61504351 is an apocalyptic number.

61504351 is a deficient number, since it is larger than the sum of its proper divisors (3617921).

61504351 is a wasteful number, since it uses less digits than its factorization.

61504351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617920.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 61504351 is about 7842.4709754005. The cubic root of 61504351 is about 394.7316470300.

Adding to 61504351 its reverse (15340516), we get a palindrome (76844867).

It can be divided in two parts, 6150 and 4351, that added together give a palindrome (10501).

The spelling of 61504351 in words is "sixty-one million, five hundred four thousand, three hundred fifty-one".