1551938955 has 16 divisors (see below), whose sum is σ = 2837831424. Its totient is φ = 709457760.

The previous prime is 1551938953. The next prime is 1551939041. The reversal of 1551938955 is 5598391551.

It is not a de Polignac number, because 1551938955 - 2¹ = 1551938953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1551938898 and 1551938907.

It is not an unprimeable number, because it can be changed into a prime (1551938953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7390081 + ... + 7390290.

It is an arithmetic number, because the mean of its divisors is an integer number (177364464).

Almost surely, 2^1551938955 is an apocalyptic number.

1551938955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1551938955 is a deficient number, since it is larger than the sum of its proper divisors (1285892469).

1551938955 is a wasteful number, since it uses less digits than its factorization.

1551938955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14780386.

The product of its digits is 1215000, while the sum is 51.

The square root of 1551938955 is about 39394.6564269826. The cubic root of 1551938955 is about 1157.7768943558.

It can be divided in two parts, 1551 and 938955, that added together give a triangular number (940506 = T₁₃₇₁).

The spelling of 1551938955 in words is "one billion, five hundred fifty-one million, nine hundred thirty-eight thousand, nine hundred fifty-five".