61240551 has 8 divisors (see below), whose sum is σ = 81868800. Its totient is φ = 40719672.

The previous prime is 61240541. The next prime is 61240561. The reversal of 61240551 is 15504216.

It is an interprime number because it is at equal distance from previous prime (61240541) and next prime (61240561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61240551 - 2⁷ = 61240423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61240541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25501 + ... + 27798.

It is an arithmetic number, because the mean of its divisors is an integer number (10233600).

Almost surely, 2^61240551 is an apocalyptic number.

61240551 is a deficient number, since it is larger than the sum of its proper divisors (20628249).

61240551 is a wasteful number, since it uses less digits than its factorization.

61240551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53685.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 61240551 is about 7825.6342234991. The cubic root of 61240551 is about 394.1664867962.

Adding to 61240551 its reverse (15504216), we get a palindrome (76744767).

The spelling of 61240551 in words is "sixty-one million, two hundred forty thousand, five hundred fifty-one".