15220415551 has 8 divisors (see below), whose sum is σ = 16605666000. Its totient is φ = 13835427840.

The previous prime is 15220415489. The next prime is 15220415641. The reversal of 15220415551 is 15551402251.

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 15220415551 - 2¹³ = 15220407359 is a prime.

It is a super-2 number, since 2×15220415551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220415051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67135 + ... + 186943.

It is an arithmetic number, because the mean of its divisors is an integer number (2075708250).

Almost surely, 2^15220415551 is an apocalyptic number.

15220415551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

15220415551 is a deficient number, since it is larger than the sum of its proper divisors (1385250449).

15220415551 is a wasteful number, since it uses less digits than its factorization.

15220415551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131369.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 15220415551 in words is "fifteen billion, two hundred twenty million, four hundred fifteen thousand, five hundred fifty-one".