1551551234242 has 16 divisors (see below), whose sum is σ = 2407912554240. Its totient is φ = 748921117392.

The previous prime is 1551551234227. The next prime is 1551551234257. The reversal of 1551551234242 is 2424321551551.

It is an interprime number because it is at equal distance from previous prime (1551551234227) and next prime (1551551234257).

It is a super-2 number, since 2×1551551234242² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1551551234195 and 1551551234204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426578 + ... + 2266765.

It is an arithmetic number, because the mean of its divisors is an integer number (150494534640).

Almost surely, 2^{1551551234242} is an apocalyptic number.

1551551234242 is a deficient number, since it is larger than the sum of its proper divisors (856361319998).

1551551234242 is a wasteful number, since it uses less digits than its factorization.

1551551234242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700617.

The product of its digits is 240000, while the sum is 40.

Adding to 1551551234242 its reverse (2424321551551), we get a palindrome (3975872785793).

The spelling of 1551551234242 in words is "one trillion, five hundred fifty-one billion, five hundred fifty-one million, two hundred thirty-four thousand, two hundred forty-two".