1551551234135 has 128 divisors (see below), whose sum is σ = 2313259720704. Its totient is φ = 974987919360.

The previous prime is 1551551234099. The next prime is 1551551234183. The reversal of 1551551234135 is 5314321551551.

It is a happy number.

It is not a de Polignac number, because 1551551234135 - 2¹² = 1551551230039 is a prime.

It is a super-2 number, since 2×1551551234135² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1551551234092 and 1551551234101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1703129330 + ... + 1703130240.

It is an arithmetic number, because the mean of its divisors is an integer number (18072341568).

Almost surely, 2^{1551551234135} is an apocalyptic number.

1551551234135 is a deficient number, since it is larger than the sum of its proper divisors (761708486569).

1551551234135 is a wasteful number, since it uses less digits than its factorization.

1551551234135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1473.

The product of its digits is 225000, while the sum is 41.

Adding to 1551551234135 its reverse (5314321551551), we get a palindrome (6865872785686).

The spelling of 1551551234135 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, one hundred thirty-five".