61225431551 has 8 divisors (see below), whose sum is σ = 63205204608. Its totient is φ = 59245956000.

The previous prime is 61225431521. The next prime is 61225431557. The reversal of 61225431551 is 15513452216.

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

It is a cyclic number.

It is not a de Polignac number, because 61225431551 - 2¹⁰ = 61225430527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61225431557) 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, 389981 + ... + 523961.

It is an arithmetic number, because the mean of its divisors is an integer number (7900650576).

Almost surely, 2^61225431551 is an apocalyptic number.

61225431551 is a deficient number, since it is larger than the sum of its proper divisors (1979773057).

61225431551 is a wasteful number, since it uses less digits than its factorization.

61225431551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148753.

The product of its digits is 36000, while the sum is 35.

Adding to 61225431551 its reverse (15513452216), we get a palindrome (76738883767).

The spelling of 61225431551 in words is "sixty-one billion, two hundred twenty-five million, four hundred thirty-one thousand, five hundred fifty-one".